Fixed stacks sometimes having the wrong amount if created on another stack

code/game/mecha/equipment/tools/other_tools.dm

@@ -367,8 +367,7 @@
 	return ..()
 
 /obj/item/mecha_parts/mecha_equipment/generator/proc/generator_init()
-	fuel = new /obj/item/stack/sheet/mineral/plasma(src)
-	fuel.amount = 0
+	fuel = new /obj/item/stack/sheet/mineral/plasma(src, 0)
 
 /obj/item/mecha_parts/mecha_equipment/generator/detach()
 	STOP_PROCESSING(SSobj, src)
@@ -472,8 +471,7 @@
 	var/rad_per_cycle = 3
 
 /obj/item/mecha_parts/mecha_equipment/generator/nuclear/generator_init()
-	fuel = new /obj/item/stack/sheet/mineral/uranium(src)
-	fuel.amount = 0
+	fuel = new /obj/item/stack/sheet/mineral/uranium(src, 0)
 
 /obj/item/mecha_parts/mecha_equipment/generator/nuclear/critfail()
 	return

code/game/mecha/equipment/tools/work_tools.dm

@@ -301,8 +301,7 @@
 
 /obj/item/mecha_parts/mecha_equipment/cable_layer/Initialize()
 	. = ..()
-	cable = new(src)
-	cable.amount = 0
+	cable = new(src, 0)
 
 /obj/item/mecha_parts/mecha_equipment/cable_layer/can_attach(obj/mecha/working/M)
 	if(..())
@@ -333,8 +332,7 @@
 		if(to_load)
 			to_load = min(target.amount, to_load)
 			if(!cable)
-				cable = new(src)
-				cable.amount = 0
+				cable = new(src, 0)
 			cable.amount += to_load
 			target.use(to_load)
 			occupant_message("<span class='notice'>[to_load] meters of cable successfully loaded.</span>")
@@ -358,8 +356,7 @@
 			m = min(m, cable.amount)
 			if(m)
 				use_cable(m)
-				var/obj/item/stack/cable_coil/CC = new (get_turf(chassis))
-				CC.amount = m
+				new /obj/item/stack/cable_coil(get_turf(chassis), m)
 		else
 			occupant_message("There's no more cable on the reel.")
 	return