covert to list to prevent calling remove on a tuple

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5479 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -1327,7 +1327,8 @@ class PortalTypeAllowedContentTypeTemplateItem(BaseTemplateItem):
         LOG("portal types not found : ", 100, portal_id)
         continue
       property_list = self._objects[key]
-      original_property_list = getattr(portal_type, self.class_property, ())
+      original_property_list = list(getattr(portal_type,
+                                    self.class_property, ()))
       for id in property_list:
         if id in original_property_list:
           original_property_list.remove(id)