mingw-w64 has added this from Proton (which added this from SDL), so we need to re-define it as a local symbol to avoid conflicting with mingw-w64 headers.
Fixes https://github.com/libsdl-org/SDL/issues/9031
(cherry picked from commit b7c61569f8)
(cherry picked from commit 93d7b6e50c)
6a83588fdd