no need to re-search if work_ids is empty


git-svn-id: svn://oss.beweb.dbc.dk/sync_php/php/OpenLibrary/OpenSearch/trunk@75515 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0
Test for start after hitCount


git-svn-id: svn://oss.beweb.dbc.dk/sync_php/php/OpenLibrary/OpenSearch/trunk@75546 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0