Fix typo in catalyst.

Fix flamethrower crafting recipe (now only use 1 rod, calls checkparts() to set up the weldingtool and igniter).
Fix lack of message when trying to turn on an unsecured welding tool.
Fix lack of icon update when clicking plasma tank with empty flamethrower.

code/game/objects/items/weapons/flamethrower.dm

@@ -157,6 +157,10 @@
 	update_icon()
 	return
 
+/obj/item/weapon/flamethrower/CheckParts()
+	weldtool = locate(/obj/item/weapon/weldingtool) in contents
+	igniter = locate(/obj/item/device/assembly/igniter) in contents
+	update_icon()
 
 //Called from turf.dm turf/dblclick
 /obj/item/weapon/flamethrower/proc/flame_turf(turflist)
@@ -195,10 +199,6 @@
 
 /obj/item/weapon/flamethrower/full/New(var/loc)
 	..()
-	for(var/obj/item/weapon/weldingtool/W in src)
-		weldtool = W
-	for(var/obj/item/device/assembly/igniter/I in src)
-		igniter = I
 	if(!weldtool)
 		weldtool = new /obj/item/weapon/weldingtool(src)
 	weldtool.status = 0
@@ -211,4 +211,4 @@
 /obj/item/weapon/flamethrower/full/tank/New(var/loc)
 	..()
 	ptank = new /obj/item/weapon/tank/internals/plasma/full(src)
-	update_icon()
+	update_icon()

code/game/objects/items/weapons/tanks/tank_types.dm

@@ -96,6 +96,7 @@
 		F.ptank = src
 		user.unEquip(src)
 		src.loc = F
+		F.update_icon()
 	return
 
 /obj/item/weapon/tank/internals/plasma/full/New()

code/game/objects/items/weapons/tools.dm

@@ -308,6 +308,7 @@
 //Toggles the welder off and on
 /obj/item/weapon/weldingtool/proc/toggle(mob/user, message = 0)
 	if(!status)
+		user << "<span class='notice'>[src] can't be turned on while unsecured.</span>"
 		return
 	welding = !welding
 	if(welding)

code/modules/crafting/recipes.dm

@@ -5,7 +5,7 @@
 	var/tools[] = list() //type paths of items needed but not consumed
 	var/time = 30 //time in deciseconds
 	var/parts[] = list() //type paths of items that will be placed in the result
-	var/chem_catalists[] = list() //like tools but for reagents
+	var/chem_catalysts[] = list() //like tools but for reagents
 
 
 /datum/table_recipe/IED
@@ -84,10 +84,10 @@
 
 /datum/table_recipe/flamethrower
 	name = "Flamethrower"
-	result = /obj/item/weapon/flamethrower/full
+	result = /obj/item/weapon/flamethrower
 	reqs = list(/obj/item/weapon/weldingtool = 1,
 				/obj/item/device/assembly/igniter = 1,
-				/obj/item/stack/rods = 2)
+				/obj/item/stack/rods = 1)
 	parts = list(/obj/item/device/assembly/igniter = 1,
 				/obj/item/weapon/weldingtool = 1)
 	tools = list(/obj/item/weapon/screwdriver)

code/modules/crafting/table.dm

@@ -17,8 +17,8 @@
 					if(table_contents[B] >= R.reqs[A])
 						continue main_loop
 			return 0
-	for(var/A in R.chem_catalists)
-		if(table_contents[A] < R.chem_catalists[A])
+	for(var/A in R.chem_catalysts)
+		if(table_contents[A] < R.chem_catalysts[A])
 			return 0
 	return 1
 
@@ -196,12 +196,12 @@
 						req_text += " [R.reqs[A]] [RE.name]"
 						qdel(RE)
 
-				if(R.chem_catalists.len)
-					catalist_text += ", Catalists:"
-					for(var/C in R.chem_catalists)
+				if(R.chem_catalysts.len)
+					catalist_text += ", Catalysts:"
+					for(var/C in R.chem_catalysts)
 						if(ispath(C, /datum/reagent))
 							var/datum/reagent/RE = new C
-							catalist_text += " [R.chem_catalists[C]] [RE.name]"
+							catalist_text += " [R.chem_catalysts[C]] [RE.name]"
 							qdel(RE)
 				if(R.tools.len)
 					tool_text += ", Tools:"