Fix systematic breakage.

SupplyCell doesn't exist as a portal type (it's a class actually), so
asContext call always fails.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@44634 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Tool/DomainTool.py

@@ -315,7 +315,7 @@ class DomainTool(BaseTool):
                 if value is not None:
                   mapped_value_property_dict[mapped_value_property] = value
         # Update mapped value
-        mapped_value = mapped_value.asContext(**mapped_value_property_dict)
+        mapped_value.edit(**mapped_value_property_dict)
       return mapped_value
 
     # XXX FIXME method should not be public