[FIX] sale: SO line autocreation for vendor bill only
[FIX] sale: SO line autocreation for vendor bill only

On a sale order, when adding a line with an expensable product with a
reinvoice policy, on the linked invoiced validation, the analytic entries
are created. During this creation, the line will be reinvoiced, so a second
SO line will appears with the same product.
This should not happen, as the SO line creation from an AAL should be done
only when the amount is negative (meaning it comes from an expense or a
vendor bill).
This was introduced in 3bf8a62e0dd99f7dad42718f895abf4fd53f996f.

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