[FIX] l10n_es_edi_tbai prevent ZeroDivisionError when invoice line quantity is zero

closes odoo#193500

Signed-off-by: Ruben Gomes (rugo) <[email protected]>

Author: uolaizola

addons/l10n_es_edi_tbai/models/account_edi_format.py

@@ -369,7 +369,7 @@ def _l10n_es_tbai_get_invoice_values(self, invoice, cancel):
             invoice_lines.append({
                 'line': line,
                 'discount': discount * refund_sign,
-                'unit_price': (line.balance + discount) / line.quantity * refund_sign,
+                'unit_price': (line.balance + discount) / line.quantity * refund_sign if line.quantity else 0.0,
                 'total': total,
                 'description': regex_sub(r'[^0-9a-zA-Z ]', '', line.name or '')[:250]
             })