[FIX] sale_stock: allow to cancel multiple orders
[FIX] sale_stock: allow to cancel multiple orders

The action was tagged multi but crashed if executed on more than one order.
Courtesy of Andrius Laukavičius

Elico-Corp/odoo_OCB,ygol/odoo,ygol/odoo,ygol/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,ygol/odoo,Elico-Corp/odoo_OCB,ygol/odoo,ygol/odoo,Elico-Corp/odoo_OCB,ygol/odoo