[FIX] sale: no company

Avoid crash at currency conversion when no company is set on the SO

opw-2009044

closes odoo#34408

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/sale/models/sale.py

@@ -1459,7 +1459,7 @@ def _get_display_price(self, product):
         if currency != self.order_id.pricelist_id.currency_id:
             base_price = currency._convert(
                 base_price, self.order_id.pricelist_id.currency_id,
-                self.order_id.company_id, self.order_id.date_order or fields.Date.today())
+                self.order_id.company_id or self.env.user.company_id, self.order_id.date_order or fields.Date.today())
         # negative discounts (= surcharge) are included in the display price
         return max(base_price, final_price)
 
@@ -1642,7 +1642,7 @@ def _onchange_discount(self):
                 # we need new_list_price in the same currency as price, which is in the SO's pricelist's currency
                 new_list_price = currency._convert(
                     new_list_price, self.order_id.pricelist_id.currency_id,
-                    self.order_id.company_id, self.order_id.date_order or fields.Date.today())
+                    self.order_id.company_id or self.env.user.company_id, self.order_id.date_order or fields.Date.today())
             discount = (new_list_price - price) / new_list_price * 100
             if (discount > 0 and new_list_price > 0) or (discount < 0 and new_list_price < 0):
                 self.discount = discount