First defined in: FKiSS3
		This will exit the current event. No more code in this event will be processed.
		Example:
    
		;@ alarm(MyTimer)
		;@   ifmapped(#4)
		;@     exitevent() ; If object #4 is mapped, stop this event right now.
		;@   endif()
		;@   timer(MyTimer, 100) ; If object #4 is mapped, this action is never executed.