[FIX] account: No tax is applied on invoice line

Steps to reproduce the bug:
- Install belgian accounting
- Create a tax REC with a fixed amount and affect base of subsequent taxes
- Create an invoice I with a line L
- Set the following taxes on L: REC (first position) and 0% EU G (second position)
- Validate the I
- Check the generated journal entries

Bug:

The account move line for REC didn't have the 0% EU G on the applied taxes field.

opw:2089240

closes odoo/odoo#39323

Signed-off-by: Simon Goffin (sig) <sig@openerp.com>