- no need to set / get selections, this is not a listbox but a search dialog form
- adjust to current ZSQLCatalog API
- raise if search criteria not specified rather than return empty list
- use proper variable naming

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33150 20353a03-c40f-0410-a6d1-a30d3c3de9de