Merge pull request #10867 from VOREStation/Fixes/10787

Fix excessive table merge, convert climbers lazy

code/game/objects/structures.dm

@@ -7,7 +7,7 @@
 	var/climb_delay = 3.5 SECONDS
 	var/breakable
 	var/parts
-	var/list/climbers = list()
+	var/list/climbers
 	var/block_turf_edges = FALSE // If true, turf edge icons will not be made on the turf this occupies.
 	
 	var/list/connections = list("0", "0", "0", "0")
@@ -35,7 +35,7 @@
 			if(H.species.can_shred(user))
 				attack_generic(user,1,"slices")
 
-	if(climbers.len && !(user in climbers))
+	if(LAZYLEN(climbers) && !(user in climbers))
 		user.visible_message("<span class='warning'>[user.name] shakes \the [src].</span>", \
 					"<span class='notice'>You shake \the [src].</span>")
 		structure_shaken()
@@ -103,21 +103,21 @@
 		return
 
 	usr.visible_message("<span class='warning'>[user] starts climbing onto \the [src]!</span>")
-	climbers |= user
+	LAZYDISTINCTADD(climbers, user)
 
 	if(!do_after(user,(issmall(user) ? climb_delay * 0.6 : climb_delay)))
-		climbers -= user
+		LAZYREMOVE(climbers, user)
 		return
 
 	if (!can_climb(user, post_climb_check=1))
-		climbers -= user
+		LAZYREMOVE(climbers, user)
 		return
 
 	usr.forceMove(get_turf(src))
 
 	if (get_turf(user) == get_turf(src))
 		usr.visible_message("<span class='warning'>[user] climbs onto \the [src]!</span>")
-	climbers -= user
+	LAZYREMOVE(climbers, user)
 
 /obj/structure/proc/structure_shaken()
 	for(var/mob/living/M in climbers)
@@ -204,7 +204,7 @@
 		if(can_visually_connect_to(S))
 			if(S.can_visually_connect())
 				if(propagate)
-					//S.update_connections() //Not here
+					S.update_connections()
 					S.update_icon()
 				dirs += get_dir(src, S)