ZF-5413: no double parentheses | NULL -> null
ZF-5413: no double parentheses | NULL -> null


git-svn-id: abaeb2b3ba5a94ed391a9405ad7d63d0414021c9@22662 44c647ce-9c0f-0410-b52a-842ac1e357ba

michaa76/ZendQueue,ripaclub/ZendQueue,stakhanovist/queue