[FIX] account: show taxes when they are zero on invoices print

Before this commit, the taxes with amount of zero are not shown on
invoice print. For instance, the 15% tax of a product with value of
€0.01 will not be show on invoice print.

This previous commit 37a0f7acae8aebef35577b178f8aeefed11c9105 allows
showing zero percent taxes on invoice print. This commit, will
fine-tuning the previous commit to also show taxes with zero amount.

opw-2307761

closes odoo/odoo#55665

X-original-commit: b8bb1e12a10477bb31addc6d3cecefa046dd09fe
Signed-off-by: Jorge Pinna Puissant (jpp) <jpp@odoo.com>
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>

addons/account/models/account_move.py

@@ -1402,9 +1402,10 @@ class AccountMove(models.Model):
             # At this point we only want to keep the taxes with a zero amount since they do not
             # generate a tax line.
             for line in move.line_ids:
-                for tax in line.tax_ids.flatten_taxes_hierarchy().filtered(lambda t: t.amount == 0.0):
-                    res.setdefault(tax.tax_group_id, {'base': 0.0, 'amount': 0.0})
-                    res[tax.tax_group_id]['base'] += tax_balance_multiplicator * (line.amount_currency if line.currency_id else line.balance)
+                for tax in line.tax_ids.flatten_taxes_hierarchy():
+                    if tax.tax_group_id not in res:
+                        res.setdefault(tax.tax_group_id, {'base': 0.0, 'amount': 0.0})
+                        res[tax.tax_group_id]['base'] += tax_balance_multiplicator * (line.amount_currency if line.currency_id else line.balance)
 
             res = sorted(res.items(), key=lambda l: l[0].sequence)
             move.amount_by_group = [(