Do not test attribute if it's not defined.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17173 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Constraint/StringAttributeMatch.py

@@ -48,6 +48,7 @@ class StringAttributeMatch(PropertyExistence):
     Check that each attribute does not match the RE
     """
     errors = PropertyExistence.checkConsistency(self, object, fixit=fixit)
+    if not errors:
       for attribute_name, attribute_value in self.constraint_definition.items():
         error_message = None
         # If property does not exist, error will be raise by