Fix

git-svn-id: http://svn.net-core.org/repos/t-engine4@6261 51575b47-30f0-44d4-a5cc-537603b46e54

game/engines/default/engine/interface/ActorAI.lua

@@ -75,7 +75,7 @@ end
 --- Move one step to the given target if possible
 -- This tries the most direct route, if not available it checks sides and always tries to get closer
 function _M:moveDirection(x, y, force)
-	if not self.x or not self.y then return false end
+	if not self.x or not self.y or not x or not y then return false end
 	local l = line.new(self.x, self.y, x, y)
 	local lx, ly = l()
 	if lx and ly then