fix warning

stepmania/src/pcre/internal.h

@@ -41,7 +41,9 @@ modules, but which are not relevant to the outside. */
 //#include "config.h"
 #define HAVE_MEMMOVE 1
 #define NEWLINE '\n'
+#if defined(_WINDOWS)
 #pragma warning( disable : 4244 )
+#endif
 
 /* To cope with SunOS4 and other systems that lack memmove() but have bcopy(),
 define a macro for memmove() if HAVE_MEMMOVE is false, provided that HAVE_BCOPY