Vanilla commit:
804445830f
This was exiting with 0 damage if _hit=="". It accounts for vehicles not
being damaged at all when crashing full speed into walls. It was also
causing the player to sometimes glitch out of the vehicle or into the
ground when crashing as you noticed before @icomrade.
Also fixed driver getting a humanity hit for damaging passengers in
crash. Reverting 22b2a3a since this is more reliable.