(svn r1597) fix: autoreplace vehicle lists are now redrawn when a new vehicle becomes available (thanks LordOfThePigs for pointing this one out)

static const byte _dir_to_straight_trackdir[4] = {
	0, 1, 8, 9,
};

static const byte _reverse_dir[4] = {
//	3, 0, 1, 2
	2, 3, 0, 1
};