tgstation/-tg-station — pull request #1788 by havocx42 (2013-11-14 22:22:30+00:00)
Title: Fix for being unable to unwrench vents

Bugs Fixed
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* You can now unwrench vents, detaching them from the floor.

Code changes:
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* Merged two attackby procs into one with no logical changes.
* added a return ..() to the attackby proc to call the general atmospherics proc for attackby which deals with unwrenching.