Unedited products are shown on posted inventory tab

When user changes the quantity in inventory General information tab and confirm inventory, posted tab in physical inventory shows products with quantity 0 which were not edited.

This problem occurs due to difference in quantity calculated by openerp. E.g location_obj._product_get(cr, uid, line.location_id.id, [pid], product_context)[pid] gives value 3.0500000000000003 while the move lines have value 3.05. The difference of those quantity is -4.440892098500626e-16 which is next to zero but nonzero value.

Hence it consider product as changed quantity and post it in posted inventory.