supports the case where role_name is empty on a role definition

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@24837 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/ERP5Type.py

@@ -467,7 +467,8 @@ class ERP5TypeInformationMixIn( FactoryTypeInformation,
       # object
       if getattr(aq_base(ob), 'isPrincipiaFolderish', 0):
         for roledef in ob.objectValues(spec = 'ERP5 Role Definition'):
-          role_category_list_dict.setdefault(roledef.getRoleName(), []).append(
+          if roledef.getRoleName():
+            role_category_list_dict.setdefault(roledef.getRoleName(), []).append(
                             {
                                 'category_order'  : ['agent'],
                                 'agent'           : roledef.getAgentList()