Change from delegate to event in NetworkedList.

Author: jaglitegrann

MLAPI/Data/NetworkedCollections/NetworkedList.cs

@@ -30,7 +30,7 @@ public class NetworkedList<T> : IList<T>, INetworkedVar
         /// <summary>
         /// The callback to be invoked when the list gets changed
         /// </summary>
-        public OnListChangedDelegate OnListChanged;
+        public event OnListChangedDelegate OnListChanged;
 
         /// <summary>
         /// Creates a NetworkedList with the default value and settings