Fix fatal error in database_attachments plugin under some conditions (#1489...

Aleksander Machniak

2014-03-25 e435d3b1205c3e1a8f925fc131ed6d18820e2143

 plugins/database_attachments/database_attachments.php

@@ -126,8 +126,10 @@
     */
    function cleanup($args)
    {
        $cache = $this->get_cache();
        $cache->remove($args['group'], true);
        // check if cache object exist, it may be empty on session_destroy (#1489726)
        if ($cache = $this->get_cache()) {
            $cache->remove($args['group'], true);
        }
    }

    /**