Ported C++mos from yogs (help me)

code/datums/mutations/actions.dm

@@ -222,9 +222,8 @@
 /obj/effect/proc_holder/spell/targeted/olfaction/cast(list/targets, mob/living/user = usr)
 	//can we sniff? is there miasma in the air?
 	var/datum/gas_mixture/air = user.loc.return_air()
-	var/list/cached_gases = air.gases
 
-	if(cached_gases[/datum/gas/miasma])
+	if(air.get_moles(/datum/gas/miasma))
 		user.adjust_disgust(sensitivity * 45)
 		to_chat(user, "<span class='warning'>With your overly sensitive nose, you get a whiff of stench and feel sick! Try moving to a cleaner area!</span>")
 		return