Merge pull request #4057 from deathride58/manualmirrors2

Manually mirrors #32838 and #32462 from upstream

code/game/atoms.dm

@@ -520,6 +520,7 @@ GLOBAL_LIST_EMPTY(blood_splatter_icons)
 
 //Hook for running code when a dir change occurs
 /atom/proc/setDir(newdir)
+	SendSignal(COMSIG_ATOM_DIR_CHANGE, dir, newdir)
 	dir = newdir
 
 /atom/proc/mech_melee_attack(obj/mecha/M)

code/game/objects/effects/decals/decal.dm

@@ -31,7 +31,7 @@
 	var/turf/T = loc
 	if(!istype(T)) //you know this will happen somehow
 		CRASH("Turf decal initialized in an object/nullspace")
-	T.AddComponent(/datum/component/turf_decal, dir, icon, icon_state)
+	T.AddComponent(/datum/component/decal, icon, icon_state, dir)
 
 /obj/effect/turf_decal/stripes/line
 	icon_state = "warningline"