Zend_Search_Lucene: fix for sorting result by multiple fields.
Zend_Search_Lucene: fix for sorting result by multiple fields.

git-svn-id: abaeb2b3ba5a94ed391a9405ad7d63d0414021c9@18601 44c647ce-9c0f-0410-b52a-842ac1e357ba

diszo2009/ZendSearch,oat-sa/ZendSearch,bayne/ZendSearch,bayne/ZendSearch,nqxcode/ZendSearch,rmzamora/ZendSearch,rmzamora/ZendSearch,nqxcode/ZendSearch,diszo2009/ZendSearch