Removes a source of ian harddels, keeps mcgruffs bed discription from getting overwritten at roundstart, moves the bed claiming feature to just the dogbed typepath, none of the subtypes, this applies to buckling too (#55158)

Removes a source of ian harddels, keeps mcgruff's bed description from getting overwritten at roundstart, moves the bed claiming feature to just the dogbed typepath, blacklisting subtypes. This applies to buckling too.

This means that a dogbed can only ever belong to one dog. Fuck you.
Remake of #54892, github doesn't like force pushes, not sure why

code/game/objects/structures/beds_chairs/bed.dm

@@ -171,7 +171,7 @@
 	anchored = FALSE
 	buildstacktype = /obj/item/stack/sheet/mineral/wood
 	buildstackamount = 10
-	var/mob/living/owner = null
+	var/owned = FALSE
 
 /obj/structure/bed/dogbed/ian
 	desc = "Ian's bed! Looks comfy."
@@ -202,10 +202,14 @@
 	name = "Runtime's bed"
 	anchored = TRUE
 
+///Used to set the owner of a dogbed, returns FALSE if called on an owned bed or an invalid one, TRUE if the possesion succeeds
 /obj/structure/bed/dogbed/proc/update_owner(mob/living/M)
-	owner = M
+	if(owned || type != /obj/structure/bed/dogbed) //Only marked beds work, this is hacky but I'm a hacky man
+		return FALSE //Failed
+	owned = TRUE
 	name = "[M]'s bed"
 	desc = "[M]'s bed! Looks comfy."
+	return TRUE //Let any callers know that this bed is ours now
 
 /obj/structure/bed/dogbed/buckle_mob(mob/living/M, force, check_loc)
 	. = ..()