#574 KoS/DoF/earlier clients sometimes don't set the new heading before stopping to direct to the next path point

as title says, spawns sometimes do not pre-set their next heading for the next position. It does not always happen and the npc will correct itself after it hits the next path point. Any npc is impacted by this that paths with lua scripting.

seems to do with the movement_mode being set to 0, our problem is movement_mode being 2 is a 'goto no hit' where we want to remain movement_mode 0 (resigned to the ground)