Refactor initial balance calculation in Trial Balance and account statements....
Jérome Perrin authored
Refactor initial balance calculation in Trial Balance and account statements. The initial balance for debit and credit is now : balance at the beginning of period + sum of movement until the initial balance date.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17006 20353a03-c40f-0410-a6d1-a30d3c3de9de
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