added fix for GetRects(). not currently called by anything but the new

compositor which is not yet enabled. approved by sar.

gfx/src/gtk/nsRegionGTK.cpp

@@ -250,6 +250,8 @@ NS_IMETHODIMP nsRegionGTK::GetRects(nsRegionRectSet **aRects)
     rect++;
   }
 
+  *aRects = rects;
+
   return NS_OK;
 }