[FIX] account: 100% tax

- Create the following tax:
  Tax Computation: Percentage of Price Tax Included
  Amount: 100 %
  Included in price
- Create an invoice, add a product with this tax
- Save

A ZeroDivision error is raised.

opw-2186998

closes odoo/odoo#44724

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>