creature: fix dissapearence

Occured when the destination point was directly below/above the creature

Signed-off-by: mkhropov <mkhropov@gmail.com>
creature: fix dig-fall bug

Where creature would fall when digging down when digging was done, but digging ACTION was still up... resulting in confuses and crashes

Signed-off-by: mkhropov <mkhropov@gmail.com>
Merge branch 'master' of https://github.com/mkhropov/Elem

Signed-off-by: mkhropov <mkhropov@gmail.com>

Conflicts:
	creature/Creature.java