catch warning message as failure.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@18473 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/tests/testXHTML.py

@@ -142,6 +142,8 @@ def validate_xhtml(source):
     if len(data) >= 2:
       if data[1].startswith('Error: '):
         return False
+      elif data[1].startswith('Warning: '):
+        return False
   return True