Fix average cost price computation

context locations should be list of ids and not instances

issue3037
review703002
(transplanted from 9a4d2bccf7f8fe00d32955d82342dfd627d749a1)

move.py

@@ -331,9 +331,10 @@ class Move(ModelSQL, ModelView):
             company = Company(company)
 
         context = {}
-        context['locations'] = Location.search([
+        locations = Location.search([
                 ('type', '=', 'storage'),
                 ])
+        context['locations'] = [l.id for l in locations]
         context['stock_date_end'] = Date.today()
         with Transaction().set_context(context):
             product = Product(product_id)