Close chest window if minecart is destroyed

src/Entities/Minecart.cpp

@@ -1206,6 +1206,7 @@ void cMinecartWithChest::OpenNewWindow()
 
 void cMinecartWithChest::Destroyed()
 {
+	GetWindow()->OwnerDestroyed();
 	cItems Pickups;
 	m_Contents.CopyToItems(Pickups);
 	GetWorld()->SpawnItemPickups(Pickups, GetPosX(), GetPosY() + 1, GetPosZ(), 4);