translation_service returns an unicode string, we need to encode it to utf8.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@4365 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Accessor/WorkflowState.py

@@ -95,7 +95,7 @@ class TranslatedGetter(Getter):
       translation_service = getToolByName(instance, 'translation_service')
       wf = portal_workflow.getWorkflowById(self._key)
       state_id = wf._getWorkflowStateOf(instance, id_only=1)
-      return translation_service.translate('ui', state_id)
+      return translation_service.translate('ui', state_id).encode('utf8')
 
     psyco.bind(__call__)
 
@@ -109,6 +109,6 @@ class TranslatedTitleGetter(TitleGetter):
       translation_service = getToolByName(instance, 'translation_service')
       wf = portal_workflow.getWorkflowById(self._key)
       state_title = wf._getWorkflowStateOf(instance).title
-      return translation_service.translate('ui', state_title)
+      return translation_service.translate('ui', state_title).encode('utf8')
 
     psyco.bind(__call__)