for both EMC and R'n'D graphics engine (heavy workarounds needed due
to massively broken handling of quicksand in R'n'D game engine)
* fixed off-limits access to array in DrawLevelFieldCrumbledSandExt()
+ * fixed crash bug (hopefully) when scrolling with cursor keys in editor
2007-09-16
* fixed small bug in toon drawing (introduced when fixing the crash bug)