Code cleanup.

Assets/Cryville/Crtr/Network/UpdateChecker.cs

@@ -6,6 +6,9 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+#if UNITY_STANDALONE_WIN && !UNITY_EDITOR
+using System.Runtime.InteropServices;
+#endif
 using System.Text;
 using System.Threading;
 using UnityEngine;