-CO2 Jetpacks now spawn with distribute_pressure 0

-Tanks in your suit storage, belt, and pockets take priority over tanks on your back when using the internals button on the HUD
-Added an extra set of vents and scrubbers to the prison wing

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@3841 316c924e-a436-60f5-8080-3fe189b3f50e

code/game/objects/tanks/jetpack.dm

@@ -93,6 +93,7 @@
 /obj/item/weapon/tank/jetpack/carbondioxide
 	name = "Jetpack (Carbon Dioxide)"
 	desc = "A tank of compressed carbon dioxide for use as propulsion in zero-gravity areas. Painted black to indicate that it should not be used as a source for internals."
+	distribute_pressure = 0
 	icon_state = "jetpack-black"
 	item_state =  "jetpack-black"
 

code/modules/mob/screen.dm

@@ -361,10 +361,7 @@
 							usr << "\red You are not wearing a mask"
 							return
 						else
-							if (istype(usr.back, /obj/item/weapon/tank))
-								usr << "\blue You are now running on internals from the [usr.back] on your back."
-								usr.internal = usr.back
-							else if (ishuman(usr) && istype(usr:s_store, /obj/item/weapon/tank))
+							if (ishuman(usr) && istype(usr:s_store, /obj/item/weapon/tank))
 								usr << "\blue You are now running on internals from the [usr:s_store] on your [usr:wear_suit]."
 								usr.internal = usr:s_store
 							else if (ishuman(usr) && istype(usr:belt, /obj/item/weapon/tank))
@@ -376,6 +373,9 @@
 							else if (istype(usr:r_store, /obj/item/weapon/tank))
 								usr << "\blue You are now running on internals from the [usr:r_store] in your right pocket."
 								usr.internal = usr:r_store
+							else if (istype(usr.back, /obj/item/weapon/tank))
+								usr << "\blue You are now running on internals from the [usr.back] on your back."
+								usr.internal = usr.back
 							else if (istype(usr.l_hand, /obj/item/weapon/tank))
 								usr << "\blue You are now running on internals from the [usr.l_hand] on your left hand."
 								usr.internal = usr.l_hand