Save dynamic brake status

Author: cesarBLG

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

@@ -1279,6 +1279,8 @@ public override void Save(BinaryWriter outf)
             outf.Write(DPUnitID);
             outf.Write(PreviousGearBoxNotch);
             outf.Write(previousChangedGearBoxNotch);
+            outf.Write(DynamicBrake);
+            outf.Write(DynamicBrakeIntervention);
 
             base.Save(outf);
 
@@ -1334,6 +1336,9 @@ public override void Restore(BinaryReader inf)
             PreviousGearBoxNotch = inf.ReadInt32();
             previousChangedGearBoxNotch = inf.ReadInt32();
 
+            DynamicBrake = inf.ReadBoolean();
+            DynamicBrakeIntervention = inf.ReadSingle();
+
             base.Restore(inf);
 
             LocomotivePowerSupply?.Restore(inf);