Handling of value based trigger parameters

[gartenriese2]

When using value based trigger parameters, CanFire returns true by default. For example:

var valueTrigger = stateMachine.SetTriggerParameters<int>(Trigger.X);
stateMachine.Configure(State.Y).PermitIf(valueTrigger, State.Z, i => i < 5);
Assert.IsFalse(stateMachine.CanFire(Trigger.X));

The assertion fails because when no parameter is used for a trigger, the default value for the parameter type is used in PermitIf.