overlay_paths_is_overlay() returns FALSE on admin paths

If you have loaded an admin page in the full browser window (i.e. not in the overlay), and you click on a link to another admin page, the overlay will flash briefly before the next page is loading. This behaviour is not there if only the overlay module and not the overlay_paths modules is enabled.

The bug is in this line:

  $return = drupal_match_path($path, overlay_paths_get_overlay_patterns()) || (path_is_admin($path) && !overlay_paths_get_overlay_patterns(FALSE));

I suppose the intentions is to match $path against the patterns returned by overlay_paths_get_overlay_patterns().