Test code build warnings with MSVC2019

 qpf2.cpp(72): warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data qpf2.cpp(99): warning C4267: 'argument': conversion from 'size_t' to 'T', possible loss of data         with         [             T=quint16         ]

 tst_qsaferenderer.cpp tst_qsaferenderer.cpp(6079): warning C4267: '=': conversion from 'size_t' to 'SafeRenderer::quint16', possible loss of data tst_qsaferenderer.cpp(7763): warning C4309: 'argument': truncation of constant value

tst_rcc.cpp(100): warning C4267: 'argument': conversion from 'size_t' to 'int', possible loss of data

zlib.lib(inflate.obj) : warning LNK4099: PDB 'zlib.pdb' was not found with 'zlib.lib(inflate.obj)' or at 'C:\Users\qt\work\tqtc-boot2qt\qtsaferenderer\tests\auto\saferenderer\release\zlib.pdb'; linking object as if no debug info