uid duplications were not checked inside object_list passed to catalogObjectList, so if two or more objects had the same uid, and they are passed to catalogObjectList at a time, an integrity error was returned from MySQL.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25759 20353a03-c40f-0410-a6d1-a30d3c3de9de