Integer-overflow in qRound through QSvgRenderer::render

1. Have a build of Qt configured with "-sanitize undefined".
2. Build the attached project.
3. Run the resulting program and pass the attached input file.

   ./report input.svg
   

   You will get output including lines like:

   SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/qtrob/dev/src/qt-5.15-base_svg-09.22/qtbase/src/corelib/kernel/qobject.cpp:420:13 in 
   ../../include/QtCore/../../../../../src/qt-5.15-base_svg-09.22/qtbase/src/corelib/global/qglobal.h:653:55: runtime error: -6,33825e+29 is outside the range of representable values of type 'int'
   SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../../include/QtCore/../../../../../src/qt-5.15-base_svg-09.22/qtbase/src/corelib/global/qglobal.h:653:55 in 
   ../../include/QtCore/../../../../../src/qt-5.15-base_svg-09.22/qtbase/src/corelib/global/qglobal.h:653:40: runtime error: -6,33825e+29 is outside the range of representable values of type 'int'
   SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../../include/QtCore/../../../../../src/qt-5.15-base_svg-09.22/qtbase/src/corelib/global/qglobal.h:653:40 in 
   ../../include/QtCore/../../../../../src/qt-5.15-base_svg-09.22/qtbase/src/corelib/global/qglobal.h:653:74: runtime error: -6,33825e+29 is outside the range of representable values of type 'int'
   SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../../include/QtCore/../../../../../src/qt-5.15-base_svg-09.22/qtbase/src/corelib/global/qglobal.h:653:74 in 
   ../../include/QtCore/../../../../../src/qt-5.15-base_svg-09.22/qtbase/src/corelib/global/qglobal.h:653:68: runtime error: signed integer overflow: -2147483648 + -2147483648 cannot be represented in type 'int'
   SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../../include/QtCore/../../../../../src/qt-5.15-base_svg-09.22/qtbase/src/corelib/global/qglobal.h:653:68 in 
   /home/qtrob/dev/src/qt-5.15-base_svg-09.22/qtbase/src/corelib/kernel/qobject.cpp:393:27: runtime error: upcast of misaligned address 0x000001382861 for type 'QObjectPrivate::Connection', which requires 8 byte alignment
   

Google's oss-fuzz found this as issue 24756.