Tweaked welding:

Welders that are on but not in use use fuel more slowly than before, when actively welding, fuel use rate increases to roughly 4 times what the previous rate was. This allows for an average of 4 regular walls to be cut through before refueling is needed, based on my testing. Shorter-length welding tasks will allow for more uses between refuels.

Also cleaned up a few things that still used the "click welder at thing, lose x units of fuel" code.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@1403 316c924e-a436-60f5-8080-3fe189b3f50e

code/WorkInProgress/recycling/disposal-construction.dm

@@ -132,9 +132,10 @@
 
 		else if(istype(I, /obj/item/weapon/weldingtool))
 			var/obj/item/weapon/weldingtool/W = I
-			if(W.remove_fuel(2,user))
+			if(W.remove_fuel(0,user))
 				playsound(src.loc, 'Welder2.ogg', 100, 1)
 				user << "Welding the pipe in place."
+				W:welding = 2
 				if(do_after(user, 20))
 					update()
 					var/pipetype = dpipetype()
@@ -145,6 +146,7 @@
 					P.updateicon()
 					del(src)
 					return
+				W:welding = 1
 			else
 				user << "You need more welding fuel to complete this task."
 				return

code/WorkInProgress/recycling/disposal.dm

@@ -694,7 +694,8 @@
 			var/obj/item/weapon/weldingtool/W = I
 
 			if(W.welding)
-				if(W.remove_fuel(3,user))
+				if(W.remove_fuel(0,user))
+					W:welding = 2
 					playsound(src.loc, 'Welder2.ogg', 100, 1)
 					// check if anything changed over 2 seconds
 					var/turf/uloc = user.loc
@@ -705,7 +706,7 @@
 						welded()
 					else
 						user << "You must stay still while welding the pipe."
-						return
+					W:welding = 1
 				else
 					user << "You need more welding fuel to cut the pipe."
 					return