Sec Hailer: Day 1 bug fixes

Added a check to the verb to prevent dead people and ghosts using the masks

Changed the obj sprite for the black mask's eyes from purple to green, to match the mob sprites

code/modules/clothing/masks/gasmask.dm

@@ -85,6 +85,8 @@
 	set category = "Object"
 	set name = "HALT"
 	set src in usr
+	if(!istype(usr, /mob/living)) return
+	if(usr.stat) return
 
 	var/phrase = 0	//selects which phrase to use
 	var/phrase_text = null