FIX Crash resulting from units stacked one on top of the other during a battle, which in turn was a result of battle map data cached by request from invisible unit before walls were setup (it allowed units to plan a path through walls, but stopping before entering them, in some cases one on top of one another)
FIX Crash when targeting enchantments of other wizards in case that wizard was not encountered yet (ie to dispel world enchantment of an unknown wizard)
