This change resolves an issue preventing the export of invoice lines without associated products to the WSFEX service. The update now automatically assigns a generic unit of measure when a product is missing, ensuring accurate data transmission. This improves the reliability of export processes for Arabic VAT invoices.

Before this change we ware not able to send to Exportation WS an invoice line that have not product because the unit or measure was empty in the webservice request.

we this change we force that if we do not have any product then we will send a generic unit of measure.