Portal Type Roles: add comment about the last parameter of base category scripts

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@28402 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Security/ERP5GroupManager.py

@@ -139,6 +139,10 @@ class ERP5GroupManager(BasePlugin):
           security_category_list = security_category_dict.setdefault(
                                             base_category_list, [])
           try:
+            # The called script may want to distinguish if it is called
+            # from here or from _updateLocalRolesOnSecurityGroups.
+            # Currently, passing portal_type='' (instead of 'Person')
+            # is the only way to make the difference.
             security_category_list.extend(
               method(base_category_list, user_name, person_object, '')
             )