[FIX] stock_account: Cannot validate a Customer Credit
[FIX] stock_account: Cannot validate a Customer Credit

Steps to reproduce the bug:

- Create a customer credit note
- Add a new item
- Don't input Product, input Description and Unit of Measure
- Click on Validate

Bug:

A traceback was raised because no product was set on the invoice line.

opw:1825972

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo