Use inventory company to complete lines

Closes #12127
(grafted from 5282d0322326c6abe1b98cb1dee1565064257e4f)

--HG--
branch : 6.0

modules/stock/inventory.py

@@ -263,7 +263,9 @@ class Inventory(Workflow, ModelSQL, ModelView):
                 product_ids = None
             else:
                 product_ids = [l.product.id for l in inventory.lines]
-            with Transaction().set_context(stock_date_end=inventory.date):
+            with Transaction().set_context(
+                    company=inventory.company.id,
+                    stock_date_end=inventory.date):
                 pbl = Product.products_by_location(
                     [inventory.location.id],
                     grouping=grouping,