CleverRaven/Cataclysm-DDA — pull request #3679 by ianestrachan (2013-10-16 21:43:16+00:00)
Title: Allow 1-square vehicles to be drivable if they have stable wheels

Closes #3621 and #3384.

If a vehicle is only 1 square big, and has a wheel with the "STABLE" flag, it is considered to have 'enough' wheels.

Also, unicycles.