Merge pull request #862 from cesarBLG/fix-engine-leak

Fix engine leak problem

Author: cesarBLG

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

@@ -911,6 +911,8 @@ public override void Update(float elapsedClockSeconds)
                     float dp = elapsedClockSeconds * RelayValveApplicationRatePSIpS;
                     if (dp > demandedPressurePSI - CylPressurePSI)
                         dp = demandedPressurePSI - CylPressurePSI;
+                    if (MaxCylPressurePSI < CylPressurePSI + dp)
+                        dp = MaxCylPressurePSI - CylPressurePSI;
 
                     // TODO: Implement a brake reservoir which keeps some air available in case of main reservoir leakage
                     // Currently we drain from the main reservoir directly
@@ -927,8 +929,6 @@ public override void Update(float elapsedClockSeconds)
                             dp = (BrakeLine2PressurePSI - CylPressurePSI) / (1 + CylVolumeM3 / BrakePipeVolumeM3);
                         BrakeLine2PressurePSI -= dp * CylVolumeM3 / BrakePipeVolumeM3;
                     }
-                    if (MaxCylPressurePSI < CylPressurePSI + dp)
-                        dp = MaxCylPressurePSI - CylPressurePSI;
                     CylPressurePSI += dp;
                 }
                 else if (demandedPressurePSI < CylPressurePSI)