Added missing reference for error log (SubnauticaNitrox#1260)

Author: Coding-Hen

NitroxClient/GameLogic/Entities.cs

@@ -7,6 +7,7 @@
 using NitroxModel.DataStructures.GameLogic.Entities.Metadata;
 using NitroxModel.DataStructures.Util;
 using NitroxModel.Helper;
+using NitroxModel.Logger;
 using NitroxModel.Packets;
 using NitroxModel_Subnautica.DataStructures;
 using UnityEngine;