change alot of id values

cmd/cart/mutation_set_delivery.go

@@ -49,7 +49,7 @@ func SetDelivery(g *CartGrain, m *messages.SetDelivery) error {
 	}
 
 	withDelivery := g.ItemsWithDelivery()
-	targetItems := make([]int, 0)
+	targetItems := make([]uint32, 0)
 
 	if len(m.Items) == 0 {
 		// Use every item currently without a delivery
@@ -57,7 +57,7 @@ func SetDelivery(g *CartGrain, m *messages.SetDelivery) error {
 	} else {
 		// Validate explicit list
 		for _, id64 := range m.Items {
-			id := int(id64)
+			id := uint32(id64)
 			found := false
 			for _, it := range g.Items {
 				if it.Id == id {