[FIX] point_of_sale: digits field doesn't exist on currency
[FIX] point_of_sale: digits field doesn't exist on currency

As the field digit doesn't exist on currency, we use decimal_places
instead which is the field containing the number of digits of the
corresponding rounding field

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