Added bbStackAlloc defines.

blitz.mod/blitz_memory.h

@@ -16,6 +16,14 @@ void		bbMemClear( void *dst,size_t size );
 void		bbMemCopy( void *dst,const void *src,size_t size );
 void		bbMemMove( void *dst,const void *src,size_t size );
 
+#ifdef _WIN32
+#include <malloc.h>
+#define bbStackAlloc _malloca
+#else
+#include <alloca.h>
+#define bbStackAlloc alloca
+#endif
+
 #ifdef __cplusplus
 }
 #endif