Retarder: Corrected error for TransmissionInputRetarder when Gearbox is...

Retarder: Corrected error for TransmissionInputRetarder when Gearbox is diseanged but clutch is closed.

VectoCore/VectoCore/Models/SimulationComponent/Impl/Retarder.cs

@@ -72,7 +72,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 
 		public IResponse Request(Second absTime, Second dt, NewtonMeter torque, PerSecond angularVelocity, bool dryRun)
 		{
-			if (angularVelocity == null || (_primaryRetarder && !DataBus.ClutchInfo.ClutchClosed(absTime))) {
+			if (angularVelocity == null || (_primaryRetarder && (!DataBus.ClutchInfo.ClutchClosed(absTime) || !DataBus.GearboxInfo.GearEngaged(absTime)))) {
 				return NextComponent.Request(absTime, dt, torque, angularVelocity, dryRun);
 			}
 			var avgAngularSpeed = (PreviousState.InAngularVelocity + angularVelocity) / 2.0;