Because Payment Transaction does not have a causality workflow, we cannot assume that getCausalityState will always be present.
This getattr test needs to be removed once Payment Transaction is linked to a correct causality workflow.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@16865 20353a03-c40f-0410-a6d1-a30d3c3de9de