GC fixes

code/modules/power/cable.dm

@@ -78,7 +78,7 @@ By design, d1 is the smallest direction and d2 is the highest
 	if(powernet)
 		cut_cable_from_powernet()				// update the powernets
 	cable_list -= src							//remove it from global cable list
-	..()										// then go ahead and delete the cable
+	return ..()									// then go ahead and delete the cable
 
 ///////////////////////////////////
 // General procedures

code/modules/power/power.dm

@@ -15,9 +15,9 @@
 	idle_power_usage = 0
 	active_power_usage = 0
 
-/obj/machinery/power/Del()
+/obj/machinery/power/Destroy()
 	disconnect_from_network()
-	..()
+	return ..()
 
 ///////////////////////////////
 // General procedures

code/modules/power/tracker.dm

@@ -23,7 +23,7 @@
 
 /obj/machinery/power/tracker/Destroy()
 	unset_control() //remove from control computer
-	..()
+	return ..()
 
 //set the control of the tracker to a given computer if closer than SOLAR_MAX_DIST
 /obj/machinery/power/tracker/proc/set_control(var/obj/machinery/power/solar_control/SC)
@@ -70,7 +70,7 @@
 				S.give_glass()
 			playsound(src.loc, 'sound/items/Deconstruct.ogg', 50, 1)
 			user.visible_message("<span class='notice'>[user] takes the glass off the tracker.</span>")
-			del(src) // qdel
+			qdel(src) // qdel
 		return
 	..()