* Don't pass wf_id parameter to doActionFor when it's not required, see http://mail.nexedi.com/pipermail/erp5-dev/2007-October/001506.html for the reason.

* catch WorkflowException rather than nothing but conflict error, because WorkflowException can now be imported in restricted python.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17350 20353a03-c40f-0410-a6d1-a30d3c3de9de