Forgot to define a variable before returning it.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5902 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ProxyField.py

@@ -166,6 +166,7 @@ class ProxyField(ZMIField):
     Optionally pass keyword arguments that get passed to TALES
     expression.
     """
+    result = None
     if id in self.widget.property_names:
       result = ZMIField.get_value(self, id, **kw)
     else: