- DiffUtils is changed so that filters are also called on deleted/added hunks.
- Fix TemplateTool_filterPortalTypeClassDiff not to fail on deleted/added hunks.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@40067 20353a03-c40f-0410-a6d1-a30d3c3de9de