Merge pull request #872 from SteelFill/retainer-state-fix

Fix Retainer State Disappearing from HUD on Restore

Author: cesarBLG

Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/Brakes/MSTS/AirSinglePipe.cs

@@ -321,6 +321,7 @@ public override void Save(BinaryWriter outf)
             outf.Write(HandbrakePercent);
             outf.Write(ReleaseRatePSIpS);
             outf.Write(RetainerPressureThresholdPSI);
+            outf.Write(RetainerDebugState);
             outf.Write(AutoCylPressurePSI);
             outf.Write(CylPressurePSI);
             outf.Write(AuxResPressurePSI);
@@ -345,6 +346,7 @@ public override void Restore(BinaryReader inf)
             HandbrakePercent = inf.ReadSingle();
             ReleaseRatePSIpS = inf.ReadSingle();
             RetainerPressureThresholdPSI = inf.ReadSingle();
+            RetainerDebugState = inf.ReadString();
             AutoCylPressurePSI = inf.ReadSingle();
             CylPressurePSI = inf.ReadSingle();
             AuxResPressurePSI = inf.ReadSingle();