don't save empty record in asset editor

Author: kianzarrin

TLM/TLM/Lifecycle/AssetDataExtension.cs

@@ -43,7 +43,7 @@ public static void OnAssetSavedImpl(string name, object asset, out Dictionary<st
                 Log.Info("AssetDataExtension.OnAssetSavedImpl():  prefab is " + prefab);
                 var assetData = AssetData.GetAssetData(prefab);
                 if (assetData == null) {
-                    Log._Debug("AssetDataExtension.OnAssetSavedImpl(): No segments to record.");
+                    Log._Debug("AssetDataExtension.OnAssetSavedImpl(): Nothing to record.");
                 } else {
                     Log._Debug("AssetDataExtension.OnAssetSavedImpl(): assetData=" + assetData);
                     userData = new Dictionary<string, byte[]>();

TLM/TLM/Manager/Impl/TrafficLightManager.cs

@@ -12,8 +12,6 @@ namespace TrafficManager.Manager.Impl {
     using ColossalFramework;
     using TrafficManager.TrafficLight.Impl;
     using TrafficManager.API.Traffic.Data;
-    using static EconomyManager;
-    using UnityEngine.Networking.Types;
 
     /// <summary>
     /// Manages traffic light toggling

TLM/TLM/State/Asset/AssetData.cs

@@ -37,10 +37,14 @@ public static AssetData GetAssetData(BuildingInfo prefab) {
             if (!HasPaths(prefab)) {
                 return null;
             }
-                
+            var record = RecordAll();
+            if (record == null || record.IsDefault()) {
+                return null;
+            }
+
             return new AssetData {
                 Version = VersionUtil.ModVersion,
-                Record = RecordAll(),
+                Record = record,
                 PathNetworkIDs = GetPathsNetworkIDs(prefab),
             };
         }