engine: disable custom DLL loader for everything except 32-bit x86

engine/common/filesystem.c

@@ -3347,7 +3347,11 @@ dll_user_t *FS_FindLibrary( const char *dllname, qboolean directpath )
 	{
 		// NOTE: if search is NULL let the OS found library himself
 		Q_strncpy( hInst->fullPath, dllpath, sizeof( hInst->fullPath ));
+#if XASH_WIN32 && XASH_X86 // a1ba: custom loader is non-portable (I just don't want to touch it)
 		hInst->custom_loader = (search) ? true : false;
+#else
+		hInst->custom_loader = false;
+#endif
 	}
 	fs_ext_path = false; // always reset direct paths