Even if expanded_object_list is empty, invokeGroup must deal with messages.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5751 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFActivity/ActivityTool.py

@@ -652,14 +652,16 @@ class ActivityTool (Folder, UniqueObject):
           LOG('WARNING ActivityTool', 0,
               'Could not call method %s on object %s' % (m.method_id, m.object_path), error=sys.exc_info())
 
-      if len(expanded_object_list) > 0:
       try:
+        if len(expanded_object_list) > 0:
           method = self.unrestrictedTraverse(method_id)
           # FIXME: how to pass parameters?
           # FIXME: how to apply security here?
           # NOTE: expanded_object_list must be set to failed objects by the callee.
           #       If it fully succeeds, expanded_object_list must be empty when returning.
           result = method(expanded_object_list)
+        else:
+          result = None
       except:
         # In this case, the group method completely failed.
         for m in new_message_list: