clear some qdel refs (#9401)

code/game/objects/items/devices/communicator/communicator.dm

@@ -372,11 +372,10 @@ var/global/list/obj/item/communicator/all_communicators = list()
 // Parameters: None
 // Description: Removes the ghost's address and nulls the exonet datum, to allow qdel()ing.
 /mob/observer/dead/Destroy()
-	. = ..()
 	if(exonet)
 		exonet.remove_address()
 		qdel_null(exonet)
-	return ..()
+	. = ..()
 
 // Proc: register_device()
 // Parameters: 1 (user - the person to use their name for)

code/modules/mob/mob_planes_vr.dm

@@ -22,8 +22,9 @@
 	my_mob = M
 
 /obj/screen/plane_master/augmented/Destroy()
+	entopic_users -= my_mob
 	my_mob = null
-	return ..()
+	. = ..()
 
 /obj/screen/plane_master/augmented/set_visibility(var/want = FALSE)
 	. = ..()

modular_chomp/code/game/objects/effects/dark_growth.dm

@@ -116,9 +116,10 @@
 	return ..()
 
 /obj/effect/dark/Destroy()
-	. = ..()
 	if(linked_node)
 		linked_node.children_effects -= src
+		linked_node = null
+	. = ..()
 
 /obj/effect/dark/process()
 	//set background = 1

modular_chomp/code/modules/vore/eating/soulcatcher.dm

@@ -63,7 +63,7 @@
 	if(istype(linked_belly))
 		UnregisterSignal(linked_belly, COMSIG_BELLY_UPDATE_VORE_FX)
 		linked_belly = null
-	..()
+	. = ..()
 
 // Sends messages to the owner of the soulcatcher
 /obj/soulgem/proc/notify_holder(var/message)