Set the Z rotation (yaw) of a vehicle.
|vehicleid||The ID of the vehicle to set the rotation of.|
|Float:z_angle||The Z angle to set.|
1: The function executed successfully.
0: The function failed to execute. The vehicle specified does not exist.
A vehicle's X and Y (pitch and roll) rotation will be reset when this function is used. The X and Y rotations can not be set. This function does not work on unoccupied vehicles (It is believed to be a GTA limitation).