Bug fix for https://bugs.launchpad.net/or/+bug/1939995 DynamicBrakeAvailable not copied to further loco instances

Author: Csantucci

Source/Orts.Simulation/Simulation/RollingStocks/MSTSLocomotive.cs

@@ -1034,6 +1034,7 @@ public override void Copy(MSTSWagon copy)
 
             DynamicBrakeBlended = locoCopy.DynamicBrakeBlended;
             DynamicBrakeBlendingEnabled = locoCopy.DynamicBrakeBlendingEnabled;
+            DynamicBrakeAvailable = locoCopy.DynamicBrakeAvailable;
             airPipeSystem = locoCopy.airPipeSystem;
             DynamicBrakeCommandStartTime = locoCopy.DynamicBrakeCommandStartTime;
             DynamicBrakeBlendingOverride = locoCopy.DynamicBrakeBlendingOverride;