ZF-4953: PHP Notice on item search: Availability is not always set.


It seems that the Availability term of the Offer search of the amazon webservices is not always available. This was apparent in the Zend_Service_Amazon_OnlineTest::testSearchMusicMozart which failed due to the notice that $availabilty->data cannot be accessed.


Will be fixed in 1.8 or as of r12667