Quiet unused-local-typedef warning that appears because of static_assert.

include/bx/macros.h

@@ -224,4 +224,7 @@
 #	define BX_WARN(_condition, ...) BX_NOOP()
 #endif // BX_CHECK
 
+// static_assert sometimes causes unused-local-typedef...
+BX_PRAGMA_DIAGNOSTIC_IGNORED_CLANG_GCC("-Wunused-local-typedef")
+
 #endif // BX_MACROS_H_HEADER_GUARD