BUG: fix for bug 506

Modules/FindMFC.cmake

@@ -10,7 +10,9 @@ SET( MFC_FOUND "NO" )
 IF( WIN32 )
   IF( NOT CYGWIN )
     IF( NOT BORLAND )
-      SET( MFC_FOUND "YES" )
+      IF( NOT MINGW )
+        SET( MFC_FOUND "YES" )
+      ENDIF( NOT MINGW )
     ENDIF( NOT BORLAND )
   ENDIF( NOT CYGWIN )
 ENDIF( WIN32 )