Fix the bodybag RegisterSignal (tgstation#44896)

Missed a callback being used to register a signal.

code/game/objects/items/bodybag.dm

@@ -44,14 +44,10 @@
 	unfoldedbag_path = /obj/structure/closet/body_bag/bluespace
 	w_class = WEIGHT_CLASS_SMALL
 	item_flags = NO_MAT_REDEMPTION
-	var/static/datum/callback/canreach_blocking_callback = CALLBACK(GLOBAL_PROC, .proc/__bluespace_bodybag_canreach_block)
 
 /obj/item/bodybag/bluespace/Initialize()
 	. = ..()
-	RegisterSignal(src, COMSIG_ATOM_CANREACH, canreach_blocking_callback)
-
-/proc/__bluespace_bodybag_canreach_block()
-	return COMPONENT_BLOCK_REACH
+	RegisterSignal(src, COMSIG_ATOM_CANREACH, .proc/CanReachReact)
 
 /obj/item/bodybag/bluespace/examine(mob/user)
 	. = ..()
@@ -66,6 +62,9 @@
 			to_chat(A, "<span class='notice'>You suddenly feel the space around you torn apart! You're free!</span>")
 	return ..()
 
+/obj/item/bodybag/bluespace/proc/CanReachReact(atom/movable/source, list/next)
+	return COMPONENT_BLOCK_REACH
+
 /obj/item/bodybag/bluespace/deploy_bodybag(mob/user, atom/location)
 	var/obj/structure/closet/body_bag/R = new unfoldedbag_path(location)
 	for(var/atom/movable/A in contents)