Converts gas, mat and reagent strings to defines

code/modules/admin/topic.dm

@@ -2012,7 +2012,7 @@
 		if(check_rights(R_ADMIN|R_SERVER|R_EVENT))
 			if(href_list["vsc"] == "airflow")
 				vsc.ChangeSettingsDialog(usr,vsc.settings)
-			if(href_list["vsc"] == "phoron")
+			if(href_list["vsc"] == GAS_PHORON)
 				vsc.ChangeSettingsDialog(usr,vsc.plc.settings)
 			if(href_list["vsc"] == "default")
 				vsc.SetDefault(usr)

code/modules/admin/verbs/debug.dm

@@ -489,7 +489,7 @@
 		if(Rad.anchored)
 			if(!Rad.P)
 				var/obj/item/tank/phoron/Phoron = new/obj/item/tank/phoron(Rad)
-				Phoron.air_contents.gas["phoron"] = 70
+				Phoron.air_contents.gas[GAS_PHORON] = 70
 				Rad.drainratio = 0
 				Rad.P = Phoron
 				Phoron.loc = Rad
@@ -528,7 +528,7 @@
 
 				var/obj/item/tank/phoron/Phoron = new/obj/item/tank/phoron(Rad)
 
-				Phoron.air_contents.gas["phoron"] = 29.1154	//This is a full tank if you filled it from a canister
+				Phoron.air_contents.gas[GAS_PHORON] = 29.1154	//This is a full tank if you filled it from a canister
 				Rad.P = Phoron
 
 				Phoron.loc = Rad
@@ -541,7 +541,7 @@
 				var/obj/machinery/atmospherics/binary/pump/Pump = M
 				if(Pump.name == "Engine Feed" && response == "Setup Completely")
 					found_the_pump = 1
-					Pump.air2.gas["nitrogen"] = 3750	//The contents of 2 canisters.
+					Pump.air2.gas[GAS_N2] = 3750	//The contents of 2 canisters.
 					Pump.air2.temperature = 50
 					Pump.air2.update_values()
 				Pump.update_use_power(USE_POWER_IDLE)
@@ -569,7 +569,7 @@
 	if(!found_the_pump && response == "Setup Completely")
 		to_chat(src, span_red("Unable to locate air supply to fill up with coolant, adding some coolant around the supermatter"))
 		var/turf/simulated/T = SM.loc
-		T.zone.air.gas["nitrogen"] += 450
+		T.zone.air.gas[GAS_N2] += 450
 		T.zone.air.temperature = 50
 		T.zone.air.update_values()