tgstation/-tg-station — pull request #1598 by KazeEspada (2013-10-17 21:48:24+00:00)
Title: Frozen Airlocks

Makes it so that Mappers can make frozen airlocks. They just use welded airlock code. Some overlays in specific doors(hatches, horizontal airlocks, and 2x1) are just placeholders.