[FIX] account: get_bar_graph_datas
[FIX] account: get_bar_graph_datas

A traceback can occur since we build labels for 6 periods but we get
data for 7 periods.

This reverts commit 48fa0a5f6c97f84222a4854049c4e596aad8ce41 and fix the
unreachable condition.

storm-computers/odoo,Elico-Corp/odoo_OCB,dfang/odoo,laslabs/odoo,storm-computers/odoo,storm-computers/odoo,hip-odoo/odoo,laslabs/odoo,Elico-Corp/odoo_OCB,bplancher/odoo,bplancher/odoo,bplancher/odoo,dfang/odoo,Elico-Corp/odoo_OCB,ygol/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,ygol/odoo,storm-computers/odoo,bplancher/odoo,microcom/odoo,ygol/odoo,microcom/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,Elico-Corp/odoo_OCB,dfang/odoo,dfang/odoo,microcom/odoo,bplancher/odoo,microcom/odoo,laslabs/odoo,dfang/odoo,hip-odoo/odoo,ygol/odoo,microcom/odoo,dfang/odoo,storm-computers/odoo,storm-computers/odoo,microcom/odoo,ygol/odoo,bplancher/odoo,hip-odoo/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,laslabs/odoo