d3athrow/vgstation13 — pull request #1568 by wild-billy (2014-09-23 18:21:09+00:00)
Title: Fix #1543 (add ghost check to shield gens)

Adds ghost check to ```/obj/machinery/shieldgen```, fixing #1543
Also adds ghost check to ```/obj/machinery/shield_gen``` since that needs it too.