admin_landing_page_access menu item not found

Hello!
Sometimes menu items in admin menu disappears, and I have nailed it down to the admin_landing_page_access function. The problem is that on line 56 you are fetching a menu item based on router_path but I believe link_path would be the right condition. The reason is the next query search for children and when using router_path the item found could be a children in itself.

After changing line 56 from:

    $item = db_fetch_array(db_query("SELECT mlid, menu_name FROM {menu_links} ml WHERE ml.router_path = '%s' AND module = 'system'", $path));

to:

    $item = db_fetch_array(db_query("SELECT mlid, menu_name FROM {menu_links} ml WHERE ml.link_path = '%s' AND module = 'system'", $path));

everything starts to function normal again.