[Bug 50836] New: dxva2api.h does not compile as C++

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50836

Bug ID: 50836
           Summary: dxva2api.h does not compile as C++
           Product: Wine
           Version: 6.4
          Hardware: x86-64
                OS: Windows
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: dxva2
          Assignee: [e-mail]
          Reporter: [e-mail]

The functions do not compile with g++ 10:

error: invalid conversion from 'void*' to 'DXVA2FixedToFloat::<unnamed
struct>*' [-fpermissive]

The functions are broken since
https://source.winehq.org/git/wine.git/commitdiff/6aeb891d529d821fa62e26c177...

On MinGW it was fixed once, but now they reimport the library from wine and it
broke in
https://sourceforge.net/p/mingw-w64/mingw-w64/ci/c0fa4d755413c4541bdad32f070...
again.

This hinders compiling Qt on Windows with GCC.