[FIX] sale: prevent -0.00 amount

In some circonstance user can show -0.00 on taxe. It is more logical to show 0.00

closes odoo/odoo#95425

Signed-off-by: Laurent Smet <las@odoo.com>
Co-authored-by: Laurent Smet <las@openerp.com>

addons/sale/models/sale.py

@@ -997,6 +997,12 @@ Reason(s) of this behavior could be:
                             res[group]['amount'] += t['amount']
                             res[group]['base'] += t['base']
             res = sorted(res.items(), key=lambda l: l[0].sequence)
+
+            # round amount and prevent -0.00
+            for group_data in res:
+                group_data[1]['amount'] = currency.round(group_data[1]['amount']) + 0.0
+                group_data[1]['base'] = currency.round(group_data[1]['base']) + 0.0
+
             order.amount_by_group = [(
                 l[0].name, l[1]['amount'], l[1]['base'],
                 fmt(l[1]['amount']), fmt(l[1]['base']),