Don't use AVX with clang if the compiler isn't building with AVX instructions Fixes https://github.com/libsdl-org/SDL/issues/4533
diff --git a/src/audio/SDL_audiocvt.c b/src/audio/SDL_audiocvt.c
index 19a0835..aec6766 100644
--- a/src/audio/SDL_audiocvt.c
+++ b/src/audio/SDL_audiocvt.c
@@ -47,7 +47,7 @@
#define HAVE_AVX_INTRINSICS 1
#endif
#if defined __clang__
-# if (__clang_major__ < 5)
+# if (__clang_major__ < 5) || !defined(__AVX__)
# undef HAVE_AVX_INTRINSICS
# endif
#elif defined __GNUC__