CleverRaven/Cataclysm-DDA — pull request #7823 by rluddy (2014-06-03 05:54:30+00:00)
Title: Forced vehicle::of_turn to zero upon load rather than leaving it undefined

Normally this doesn't matter because vehicle::gain_moves() will
clobber of_turn when the map next updates all the vehicles. However, if the
player is driving really fast it's possible for a vehicle to be loaded
while the map is in the middle of updating the vehicles, where the
undefined of_turn was sometimes an issue.