Define select_expression even when show_stat is false.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@1381 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ListBox.py

@@ -729,9 +729,9 @@ class ListBoxWidget(Widget.Widget):
         # Prepare the stat select_expression
         #
         ###############################################################
+        select_expression = ''
         if show_stat:
           stats = here.portal_selections.getSelectionStats(selection_name, REQUEST=REQUEST)
-          select_expression = ''
           index = 0
 
           for (sql,title,alias) in extended_columns: