Camino only - Bug 371488: Prevent tab close button from locking in hovered mode. r/sr=pink

camino/src/extensions/RolloverImageButton.m

@@ -237,6 +237,7 @@
   if (mTrackingTag != -1) {
     [self removeTrackingRect:mTrackingTag];
     mTrackingTag = -1;
+    [self updateImage:NO];
   }
 }