[FIX] purchase: currency of PO

When a PO is created automatically from a procurement, the currency is
the currency of the connected user, which might be different from the
currency of the pricelist.

The fix set the currency to the currency of the pricelist.

opw-665573

addons/purchase/purchase.py

@@ -1664,6 +1664,7 @@ class procurement_order(osv.osv):
                 'location_id': procurement.location_id.id,
                 'picking_type_id': procurement.rule_id.picking_type_id.id,
                 'pricelist_id': partner.property_product_pricelist_purchase.id,
+                'currency_id': partner.property_product_pricelist_purchase.currency_id.id,
                 'date_order': purchase_date.strftime(DEFAULT_SERVER_DATETIME_FORMAT),
                 'company_id': procurement.company_id.id,
                 'fiscal_position': fp,