astar.c:

Fixed a few comments.
Merge branch 'master' of https://github.com/Daenks/Meridian59_103 into AStarKod
Merge branch 'master' of https://github.com/Daenks/Meridian59_103 into AStarKod
astar.c:
  added DisplayGrid() to output the current search grid to the dubg log
  updated node initialization
  added some extra checks to try and prevent crashes
astar.h:
  changed some comments
Merge branch 'AStarKod' of https://github.com/Daenks/Meridian59_103 into astar