MSVC: Add –d2UndefIntOverflow–

[jedisct1]

When using zig/clang/gcc, we unconditionally enable -fwrapv in order make overflowing signed operations well defined.

But this is not the case when using MSVC.

–d2UndefIntOverflow– is a compiler flag equivalent to -fwrapv: https://devblogs.microsoft.com/cppblog/new-code-optimizer/

We should figure out how to enable it in the Visual Studio solutions.

[jedisct1]

Does anybody know how to do this?

[GPUex]

Well tried using latest VS 2022: Project properties -> C/C++ -> Command line -> added /d2UndefIntOverflow-
But on got compile error: Error C1007 unrecognized flag '-UndefIntOverflow-' in 'p2'
So it seems it's no longer valid flag, unless I'm missing something .