[FIX] payment: fallback on transaction partner parent name

In a Sale Order, it is possible to select an invoice address without a
name. The partner of the transaction does not have a name, which leads
to a traceback when trying to split the name.

The idea is to force the name to be filled, with a fallback on the
partner' parent name.

OPW-3338406

closes odoo/odoo#125236

X-original-commit: 505109d4
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>
Signed-off-by: Vallaeys Valentin (vava) <vava@odoo.com>

addons/payment/models/payment_transaction.py

@@ -172,7 +172,8 @@ class PaymentTransaction(models.Model):
             # Duplicate partner values.
             partner = self.env['res.partner'].browse(values['partner_id'])
             values.update({
-                'partner_name': partner.name,
+                # Use the parent partner as fallback if the invoicing address has no name.
+                'partner_name': partner.name or partner.parent_id.name,
                 'partner_lang': partner.lang,
                 'partner_email': partner.email,
                 'partner_address': payment_utils.format_partner_address(