[FIX] stock: stock manager can have an access error to stock location

If the user change the access right to filter some stock location or multi
company, the user can have an access error to read stock pack operation.

opw-747526

addons/stock/models/stock_pack_operation.py

@@ -110,10 +110,11 @@ class PackOperation(models.Model):
                 qty -= record.qty
             self.remaining_qty = float_round(qty, precision_rounding=self.product_id.uom_id.rounding)
 
-    @api.one
+    @api.multi
     def _compute_location_description(self):
-        self.from_loc = '%s%s' % (self.location_id.name, self.product_id and self.package_id.name or '')
-        self.to_loc = '%s%s' % (self.location_dest_id.name, self.result_package_id.name or '')
+        for operation, operation_sudo in zip(self, self.sudo()):
+            self.from_loc = '%s%s' % (operation_sudo.location_id.name, self.product_id and operation_sudo.package_id.name or '')
+            self.to_loc = '%s%s' % (operation_sudo.location_dest_id.name, operation_sudo.result_package_id.name or '')
 
     @api.one
     def _compute_lots_visible(self):