[FIX] website_quote: Adding a suggested product in a SO
[FIX] website_quote: Adding a suggested product in a SO

When adding a suggested product which already exists in the SO,
it crashed due to a programming error.

opw:801047

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