Title of new object has to be initialized to None.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@9197 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Utils.py

@@ -320,7 +320,7 @@ class DocumentConstructor(Method):
 
     def __call__(self, folder, id, REQUEST=None,
                  activate_kw=None, is_indexable=None, **kw):
-      o = self.klass(id)
+      o = self.klass(id, title=None)
       if activate_kw is not None:
         o._v_activate_kw = activate_kw
       if is_indexable is not None: