Fix search on date fields. Based on a patch by J��rome Perrin.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5346 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ListBox.py

@@ -1409,7 +1409,7 @@ onChange="submitAction(this.form,'%s/portal_selections/setReportRoot')">
 
           for cname in extended_columns:
             if cname[0] in search_columns_id_list:
-              alias = str(cname[2])
+              alias = str(cname[0])
               if type(alias) == type(''):
                 alias = unicode(alias, 'utf-8')
               param = params.get(alias,'')