fix wrong usage for acces to waypoint list
 ( regression : https://github.com/LK8000/LK8000/commit/f20dc7b42258d4c2ea9b24f197a074f6f0b24608 )
More LKASSERT for ActiveWayPoint
	modified:   ../Calculations2.cpp
	modified:   TaskStatistic.cpp
Merge branch 'AAT' of git://github.com/brunotl/LK8000 into bruno