allow to do filter expression on portal type

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@20339 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ZSQLCatalog/SQLCatalog.py

@@ -2359,6 +2359,7 @@ class Catalog(Folder,
             'isPredicate':  ob.isPredicate, # XXX
             'isDocument':   ob.isDocument, # XXX
             'isInventory':  ob.isInventory, # XXX
+            'portal_type':  ob.portal_type, # XXX
             'isInventoryMovement': ob.isInventoryMovement, # XXX
             }
         return getEngine().getContext(data)