fix compile error. definition of VOID in trunk still conflicts with windows...

fix compile error. definition of VOID in trunk still conflicts with windows headers. that was fixed in 6.0

mysys/my_gethwaddr.c

@@ -102,6 +102,14 @@ my_bool my_gethwaddr(uchar *to)
 }
 
 #elif defined(__WIN__)
+
+/* Workaround for BUG#32082 (Definition of VOID in my_global.h conflicts with
+windows headers) */ 
+#ifdef VOID 
+#undef VOID 
+#define VOID void 
+#endif
+
 #include <iphlpapi.h>
 
 /*