to initialise some variables like portal_type and filename to ease
the creation of temporary object. Without this patch, the first portal_type
of allowed_content_type of portal_contribution is used.



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@34888 20353a03-c40f-0410-a6d1-a30d3c3de9de