Merge pull request #1077 from cesarBLG/sme-regression-fix

Fix SME brakes not working

Author: cesarBLG

Source/Orts.Simulation/Simulation/Physics/Train.cs

@@ -4104,7 +4104,7 @@ public void UnconditionalInitializeBrakes()
                     fullServPressurePSI = lead.BrakeSystem is VacuumSinglePipe ? 16 : maxPressurePSI - lead.TrainBrakeController.FullServReductionPSI;
                     EqualReservoirPressurePSIorInHg = Math.Min(maxPressurePSI, EqualReservoirPressurePSIorInHg);
                     lead.TrainBrakeController.UpdatePressure(ref EqualReservoirPressurePSIorInHg, 1000, ref BrakeLine4);
-                    if (!(lead.BrakeSystem is EPBrakeSystem))
+                    if (!(lead.BrakeSystem is EPBrakeSystem) && !(lead.BrakeSystem is SMEBrakeSystem))
                         BrakeLine4 = -1;
                     EqualReservoirPressurePSIorInHg =
                             MathHelper.Max(EqualReservoirPressurePSIorInHg, fullServPressurePSI);
@@ -4436,7 +4436,7 @@ public void PropagateBrakePressure(float elapsedClockSeconds)
                 if (lead.TrainBrakeController != null)
                 {
                     lead.TrainBrakeController.UpdatePressure(ref EqualReservoirPressurePSIorInHg, elapsedClockSeconds, ref BrakeLine4);
-                    if (!(lead.BrakeSystem is EPBrakeSystem))
+                    if (!(lead.BrakeSystem is EPBrakeSystem) && !(lead.BrakeSystem is SMEBrakeSystem))
                         BrakeLine4 = -1;
                 }
                 if (lead.EngineBrakeController != null)