-Added a "landmarks_list"; the game will now check for landmarks in the list instead of the world.

-Did some optimizing to AI freelook.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4670 316c924e-a436-60f5-8080-3fe189b3f50e

code/game/objects/effects/landmarks.dm

@@ -69,8 +69,13 @@
 			xeno_spawn += loc
 			del(src)
 
+	landmarks_list += src
 	return 1
 
+/obj/effect/landmark/Del()
+	landmarks_list -= src
+	..()
+
 /obj/effect/landmark/start
 	name = "start"
 	icon = 'icons/mob/screen1.dmi'