small fixes

code/controllers/subsystem/air.dm

@@ -191,7 +191,7 @@ var/datum/subsystem/air/SSair
 				else
 					enemy_air = new
 					enemy_air.copy_from_turf(enemy_tile)
-				if(!T.air.compare(enemy_simulated.air))
+				if(!T.air.compare(enemy_air))
 					T.excited = 1
 					active_turfs |= T
 					break

code/datums/gas_mixture.dm

@@ -40,8 +40,8 @@ var/list/gas_heats = list( //this is actually the list that decides what gases e
 
 /proc/gaseslist()
 	. = new /list
-	for(var/specific_heat in gas_heats)
-		. += gaslist(specific_heat)
+	for(var/i in 1 to gas_heats.len)
+		.[i] = gaslist(gas_heats[i])
 
 /proc/gaslist(specific_heat)
 	. = new /list