fix

Fixes the uninitialized NetworkVariableBase exception issue for dynamically spawned NetworkObjects.

Author: NoelStephensUnity

com.unity.netcode.gameobjects/Tests/Runtime/ListChangedTest.cs

@@ -30,8 +30,12 @@ public static NetworkObject GetNetworkObjectById(ulong networkObjectId)
             return null;
         }
 
+        public NetworkList<int> MyNetworkList = new NetworkList<int>();
+
         public override void OnNetworkSpawn()
         {
+            MyNetworkList.OnListChanged += Changed;
+
             if (NetworkManager.LocalClientId == ClientIdToTarget)
             {
                 ClientTargetedNetworkObjects.Add(this);
@@ -48,14 +52,6 @@ public override void OnNetworkDespawn()
             base.OnNetworkDespawn();
         }
 
-        public NetworkList<int> MyNetworkList;
-
-        private void Start()
-        {
-            MyNetworkList = new NetworkList<int>();
-            MyNetworkList.OnListChanged += Changed;
-        }
-
         public void Changed(NetworkListEvent<int> listEvent)
         {
             Debug.Log($"listEvent.Type is {listEvent.Type}");