Fixed and cleaned up ZAS. Added some better sanity to explosion locations.

ZAS procs are now more standardized, needs more comments though.
Connections between zones now self-manage themselves, adjusting things if/when the turfs they are on change zones. (The check for this is very efficient and fast, but a bit hard to read codewise)
Zone share percent set to 4.  Seems to work well.

code/modules/power/antimatter/fuel.dm

@@ -46,7 +46,7 @@
 	var/strength = convert2energy(mass)
 
 	if (strength < 773.0)
-		var/turf/T = get_turf(src.loc)
+		var/turf/T = get_turf(src)
 
 		if (strength > (450+T0C))
 			explosion(T, 0, 1, 2, 4)

code/modules/power/lighting.dm

@@ -399,7 +399,7 @@
 // explode the light
 
 /obj/machinery/light/proc/explode()
-	var/turf/T = get_turf(src.loc)
+	var/turf/T = get_turf(src)
 	spawn(0)
 		broken()	// break it first to give a warning
 		sleep(2)

code/modules/power/pacman2.dm

@@ -70,7 +70,7 @@
 
 	proc
 		overheat()
-			explosion(src.loc, 2, 5, 2, -1)
+			explosion(get_turf(src), 2, 5, 2, -1)
 
 	attackby(var/obj/item/O as obj, var/mob/user as mob)
 		if(istype(O, /obj/item/weapon/tank/plasma))

code/modules/power/port_gen.dm

@@ -183,7 +183,7 @@ display round(lastgen) and plasmatank amount
 
 	proc
 		overheat()
-			explosion(src.loc, 2, 5, 2, -1)
+			explosion(get_turf(src), 2, 5, 2, -1)
 
 	attackby(var/obj/item/O as obj, var/mob/user as mob)
 		if(istype(O, sheet_path))
@@ -302,7 +302,7 @@ display round(lastgen) and plasmatank amount
 	time_per_sheet = 25
 	board_path = "/obj/item/weapon/circuitboard/pacman/super"
 	overheat()
-		explosion(src.loc, 3, 3, 3, -1)
+		explosion(get_turf(src), 3, 3, 3, -1)
 
 /obj/machinery/power/port_gen/pacman/mrs
 	name = "M.R.S.P.A.C.M.A.N.-type Portable Generator"
@@ -312,7 +312,7 @@ display round(lastgen) and plasmatank amount
 	time_per_sheet = 30
 	board_path = "/obj/item/weapon/circuitboard/pacman/mrs"
 	overheat()
-		explosion(src.loc, 4, 4, 4, -1)
+		explosion(get_turf(src), 4, 4, 4, -1)
 
 /obj/machinery/power/port_gen/pacman/industrial
 	name = "Industrial P.A.C.M.A.N.-type Portable Generator"
@@ -322,4 +322,4 @@ display round(lastgen) and plasmatank amount
 	time_per_sheet = 30
 	board_path = "/obj/item/weapon/circuitboard/pacman/industrial"
 	overheat()
-		explosion(src.loc, 4, 4, 4, -1)
+		explosion(get_turf(src), 4, 4, 4, -1)

code/modules/power/singularity/singularity.dm

@@ -258,7 +258,7 @@ var/global/list/uneatable = list(
 
 				if (istype(A,/obj/item/weapon/storage/backpack/holding))
 					var/dist = max((current_size - 2),1)
-					explosion(src.loc,(dist),(dist*2),(dist*4))
+					explosion(get_turf(src),(dist),(dist*2),(dist*4))
 					return
 
 				if(istype(A, /obj/machinery/singularity))//Welp now you did it
@@ -266,7 +266,7 @@ var/global/list/uneatable = list(
 					src.energy += (S.energy/2)//Absorb most of it
 					del(S)
 					var/dist = max((current_size - 2),1)
-					explosion(src.loc,(dist),(dist*2),(dist*4))
+					explosion(get_turf(src),(dist),(dist*2),(dist*4))
 					return//Quits here, the obj should be gone, hell we might be
 
 				if((teleport_del) && (!istype(A, /obj/machinery)))//Going to see if it does not lag less to tele items over to Z 2

code/modules/power/smes.dm

@@ -304,9 +304,9 @@
 
 
 	proc/ion_act()
-		if(src.z == 1)
+		if(z == 1)
 			if(prob(1)) //explosion
-				world << "\red SMES explosion in [src.loc.loc]"
+				world << "\red SMES explosion in \the [get_turf(src)]"
 				for(var/mob/M in viewers(src))
 					M.show_message("\red The [src.name] is making strange noises!", 3, "\red You hear sizzling electronics.", 2)
 				sleep(10*pick(4,5,6,7,10,14))
@@ -314,11 +314,11 @@
 				smoke.set_up(3, 0, src.loc)
 				smoke.attach(src)
 				smoke.start()
-				explosion(src.loc, -1, 0, 1, 3, 0)
+				explosion(get_turf(src), -1, 0, 1, 3, 0)
 				del(src)
 				return
 			if(prob(15)) //Power drain
-				world << "\red SMES power drain in [src.loc.loc]"
+				world << "\red SMES power drain in \the [get_turf(src)]"
 				var/datum/effect/effect/system/spark_spread/s = new /datum/effect/effect/system/spark_spread
 				s.set_up(3, 1, src)
 				s.start()
@@ -327,7 +327,7 @@
 				else
 					emp_act(2)
 			if(prob(5)) //smoke only
-				world << "\red SMES smoke in [src.loc.loc]"
+				world << "\red SMES smoke in \the [get_turf(src)]"
 				var/datum/effect/effect/system/harmless_smoke_spread/smoke = new /datum/effect/effect/system/harmless_smoke_spread()
 				smoke.set_up(3, 0, src.loc)
 				smoke.attach(src)