Fix C4267 MSVC conversion warnings

agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(133): warning C4267: '+=': conversion from 'size_t' to '_Ty', possible loss of data
agent:2022/03/21 13:30:22 build.go:394:         with
agent:2022/03/21 13:30:22 build.go:394:         [
agent:2022/03/21 13:30:22 build.go:394:             _Ty=std::_Vbase
agent:2022/03/21 13:30:22 build.go:394:         ]
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(333): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(333): warning C4267: 'initializing': conversion from 'size_t' to 'const int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(360): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(360): warning C4267: 'initializing': conversion from 'size_t' to 'const int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(361): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(361): warning C4267: 'initializing': conversion from 'size_t' to 'const int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(362): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(362): warning C4267: 'initializing': conversion from 'size_t' to 'const int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(363): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(363): warning C4267: 'initializing': conversion from 'size_t' to 'const int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(383): warning C4267: 'argument': conversion from 'size_t' to 'uint', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(384): warning C4267: 'argument': conversion from 'size_t' to 'uint', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(388): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(388): warning C4267: 'initializing': conversion from 'size_t' to 'const int', possible loss of data
agent:2022/03/21 13:30:22 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(397): warning C4267: '=': conversion from 'size_t' to 'Qt3DExtras::`anonymous-namespace'::IndexType', possible loss of data
agent:2022/03/21 13:30:23 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(398): warning C4267: '=': conversion from 'size_t' to 'Qt3DExtras::`anonymous-namespace'::IndexType', possible loss of data
agent:2022/03/21 13:30:23 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(399): warning C4267: '=': conversion from 'size_t' to 'Qt3DExtras::`anonymous-namespace'::IndexType', possible loss of data
agent:2022/03/21 13:30:23 build.go:394: \Users\qt\work\qt\qt3d\src\extras\3dtext\qextrudedtextgeometry.cpp(408): warning C4267: 'argument': conversion from 'size_t' to 'uint', possible loss of data
agent:2022/03/21 13:46:43 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\geometryloaders\default\basegeometryloader.cpp(163): warning C4267: 'argument': conversion from 'size_t' to 'uint', possible loss of data
agent:2022/03/21 13:46:43 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\geometryloaders\default\basegeometryloader.cpp(168): warning C4267: 'argument': conversion from 'size_t' to 'uint', possible loss of data
agent:2022/03/21 13:46:43 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\geometryloaders\default\basegeometryloader.cpp(174): warning C4267: 'argument': conversion from 'size_t' to 'uint', possible loss of data
agent:2022/03/21 13:46:43 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\geometryloaders\default\basegeometryloader.cpp(180): warning C4267: 'argument': conversion from 'size_t' to 'uint', possible loss of data
agent:2022/03/21 13:46:43 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\geometryloaders\default\basegeometryloader.cpp(204): warning C4267: 'argument': conversion from 'size_t' to 'uint', possible loss of data
agent:2022/03/21 13:46:48 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\geometryloaders\default\stlgeometryloader.cpp(93): warning C4267: 'argument': conversion from 'size_t' to '_Ty', possible loss of data
agent:2022/03/21 13:46:48 build.go:394:         with
agent:2022/03/21 13:46:48 build.go:394:         [
agent:2022/03/21 13:46:48 build.go:394:             _Ty=unsigned int
agent:2022/03/21 13:46:48 build.go:394:         ]
agent:2022/03/21 13:48:41 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\renderers\opengl\renderer\glshader.cpp(239): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:48:41 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\renderers\opengl\renderer\glshader.cpp(239): warning C4267: 'initializing': conversion from 'size_t' to 'const int', possible loss of data
agent:2022/03/21 13:48:41 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\renderers\opengl\renderer\glshader.cpp(328): warning C4267: '+=': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:48:41 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\renderers\opengl\renderer\glshader.cpp(346): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:48:41 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\renderers\opengl\renderer\glshader.cpp(360): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:48:41 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\renderers\opengl\renderer\glshader.cpp(389): warning C4267: '+=': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:48:41 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\renderers\opengl\renderer\glshader.cpp(402): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/21 13:48:41 build.go:394: \Users\qt\work\qt\qt3d\src\plugins\renderers\opengl\renderer\glshader.cpp(409): warning C4267: '+=': conversion from 'size_t' to 'int', possible loss of data
agent:2022/03/22 16:15:34 build.go:394: \Users\qt\work\qt\qt3d\tests\auto\quick3d\quick3dbuffer\tst_quick3dbuffer.cpp(73): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data