[REG 6.4.3 -> 6.5.0] Integer overflow in qfixed_p.h when rendering SVG image on the minimal plugin

1. Have a build of Qt configured with "-sanitize undefined"
2. Build the attached project with it.

   qt-cmake /tmp/report/ && cmake --build .
   

3. Run the resulting program on the minimal plugin and pass the attached input file.

   ./report /tmp/report/58149.svg -platform minimal
   

   The output will end in something like:

   /home/qtrob/dev/clang-15.0.7/qt-dev_05.02-base_imageformats_svg-fubsan-qt-tiff/qtbase/include/QtGui/6.6.0/QtGui/private/../../../../../../../../src/qt-dev_05.02-base_imageformats_svg/qtbase/src/gui/painting/qfixed_p.h:53:51: runtime error: signed integer overflow: 2147443200 + 70400 cannot be represented in type 'int'
   SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/qtrob/dev/clang-15.0.7/qt-dev_05.02-base_imageformats_svg-fubsan-qt-tiff/qtbase/include/QtGui/6.6.0/QtGui/private/../../../../../../../../src/qt-dev_05.02-base_imageformats_svg/qtbase/src/gui/painting/qfixed_p.h:53:51 in
   

   Google's detailed report contains a stacktrace.

Google's oss-fuzz found this as issue 58149. They will publish their report on July 17th, the latest. The similar report 52532 is already public.