More hard dels tracking (#37654)

code/modules/mob/dead/observer/observer.dm

@@ -132,11 +132,14 @@ var/creating_arena = FALSE
 	..()
 
 /mob/dead/observer/Destroy()
-	..()
+	var/datum/gamemode/dynamic/dyn_mode = ticker.mode
+	if (istype(dyn_mode))
+		dyn_mode.dead_players -= src
 	unregister_event(/event/after_move, src, nameof(src::update_holomaps()))
 	QDEL_NULL(station_holomap)
 	ghostMulti = null
 	observers.Remove(src)
+	return ..()
 
 /mob/dead/observer/proc/update_holomaps()
 	if(station_holomap)

code/modules/mob/living/living.dm

@@ -26,6 +26,11 @@
 
 	if(addicted_chems)
 		QDEL_NULL(addicted_chems)
+
+	var/datum/gamemode/dynamic/dyn_mode = ticker.mode
+	if (istype(dyn_mode))
+		dyn_mode.living_players -= src
+
 	. = ..()
 
 /mob/living/examine(var/mob/user, var/size = "", var/show_name = TRUE, var/show_icon = TRUE) //Show the mob's size and whether it's been butchered

code/modules/mob/mob.dm

@@ -53,6 +53,11 @@
 	attack_delayer = null
 	special_delayer = null
 	throw_delayer = null
+
+	dark_plane = null
+	self_vision = null
+	master_plane = null
+
 	QDEL_NULL(hud_used)
 	for(var/atom/movable/leftovers in src)
 		qdel(leftovers)