add encode(utf8) on translated state title

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26081 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Accessor/WorkflowState.py

@@ -118,6 +118,6 @@ class TranslatedTitleGetter(TitleGetter):
       if result == '':
         result = localizer.erp5_ui.gettext(state_title,
                               lang=selected_language)
-      return result
+      return result.encode('utf8')
 
     psyco.bind(__call__)