Don't disable clang avx instrinsics on win32 if __AVX__ is defined. C.f.: https://github.com/libsdl-org/SDL/issues/4533
diff --git a/src/audio/SDL_audiocvt.c b/src/audio/SDL_audiocvt.c
index f422b2b..06ccce7 100644
--- a/src/audio/SDL_audiocvt.c
+++ b/src/audio/SDL_audiocvt.c
@@ -47,7 +47,10 @@
#define HAVE_AVX_INTRINSICS 1
#endif
#if defined __clang__
-# if (__clang_major__ < 5) || defined(_MSC_VER) || defined(__SCE__)
+# if (__clang_major__ < 5)
+# undef HAVE_AVX_INTRINSICS
+# endif
+# if (defined(_MSC_VER) || defined(__SCE__)) && !defined(__AVX__)
# undef HAVE_AVX_INTRINSICS
# endif
#elif defined __GNUC__