rnd-20100624-2-src

* fixed another memory violation bug in the native Supaplex game engine
  (this potential memory bug was also in the original Megaplex code, but
  apparently only occured under rare conditions triggered by using the
  additional added preceding playfield memory area to make a few strange
  levels using dirty off-playfield tricks (bugs) like "12s033.sp" also
  solvable (this all worked fine in the classic DOS version, of course))