Fix warnings by only defining _UINT16 & _UINT32 if they aren't already defined.

Thanks to Josh Soref <timeless@mac.com> for the patch.
Bug #107599


git-svn-id: svn://10.0.0.236/trunk@107080 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/include/xp_core.h

@@ -248,9 +248,13 @@ typedef int (*FARPROC)();
 #ifndef _INT32
 #define _INT32
 #endif
+#ifndef _UINT16
 #define _UINT16
+#endif
+#ifndef _UINT32
 #define _UINT32
 #endif
+#endif
 
 /* function classifications */