Fix an issue that snuck in from previous commit

SteelFill · SteelFill · commit 2fed4b9ca5ce · 2023-08-24T23:55:18.000-05:00
diff --git a/Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/Brakes/MSTS/AirSinglePipe.cs b/Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/Brakes/MSTS/AirSinglePipe.cs
@@ -807,13 +807,15 @@ public override void Update(float elapsedClockSeconds)
                         EmergResPressurePSI -= dp;
                         BrakeLine1PressurePSI += dp * EmergBrakeLineVolumeRatio;
                     }
-                    else // Quick recharge: Emergency res air used to recharge aux res on older control valves
+                    else if (!EmergResQuickRelease) // Quick recharge: Emergency res air used to recharge aux res on older control valves
                     {
                         float dp = elapsedClockSeconds * MaxAuxilaryChargingRatePSIpS;
                         if (AuxResPressurePSI + dp > EmergResPressurePSI - dp / EmergAuxVolumeRatio)
                             dp = (EmergResPressurePSI - AuxResPressurePSI) * EmergAuxVolumeRatio / (1 + EmergAuxVolumeRatio);
                         if (BrakeLine1PressurePSI < AuxResPressurePSI + dp)
                             dp = (BrakeLine1PressurePSI - AuxResPressurePSI);
+                        if (dp < 0)
+                            dp = 0;
                         AuxResPressurePSI += dp;
                         EmergResPressurePSI -= dp / EmergAuxVolumeRatio;
                     }

Original file line number	Diff line number	Diff line change
`@@ -807,13 +807,15 @@ public override void Update(float elapsedClockSeconds)`
`807`	`807`	`EmergResPressurePSI -= dp;`
`808`	`808`	`BrakeLine1PressurePSI += dp * EmergBrakeLineVolumeRatio;`
`809`	`809`	`}`
`810`		`- else // Quick recharge: Emergency res air used to recharge aux res on older control valves`
	`810`	`+ else if (!EmergResQuickRelease) // Quick recharge: Emergency res air used to recharge aux res on older control valves`
`811`	`811`	`{`
`812`	`812`	`float dp = elapsedClockSeconds * MaxAuxilaryChargingRatePSIpS;`
`813`	`813`	`if (AuxResPressurePSI + dp > EmergResPressurePSI - dp / EmergAuxVolumeRatio)`
`814`	`814`	`dp = (EmergResPressurePSI - AuxResPressurePSI) * EmergAuxVolumeRatio / (1 + EmergAuxVolumeRatio);`
`815`	`815`	`if (BrakeLine1PressurePSI < AuxResPressurePSI + dp)`
`816`	`816`	`dp = (BrakeLine1PressurePSI - AuxResPressurePSI);`
	`817`	`+ if (dp < 0)`
	`818`	`+ dp = 0;`
`817`	`819`	`AuxResPressurePSI += dp;`
`818`	`820`	`EmergResPressurePSI -= dp / EmergAuxVolumeRatio;`
`819`	`821`	`}`