fix report sections for GL: we must show a report section if the accounts have movement in the period, or if the account have a non zero balance at the beginning of the period.
Prior to that change it was only showing accounts with movements in the period.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33987 20353a03-c40f-0410-a6d1-a30d3c3de9de