fix a bug : aggregated_amount_list can be empty in the case all movements should be removed. So we have to enter in the loop to put all movements in movement_to_delete_list


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27524 20353a03-c40f-0410-a6d1-a30d3c3de9de