Updates emag attackby usages to emag_act where it's not too much of a headache.

code/game/objects/structures/crates_lockers/crates.dm

@@ -187,7 +187,15 @@
 /obj/structure/closet/crate/secure/attackby(obj/item/weapon/W as obj, mob/user as mob)
 	if(is_type_in_list(W, list(/obj/item/weapon/packageWrap, /obj/item/stack/cable_coil, /obj/item/device/radio/electropack, /obj/item/weapon/wirecutters)))
 		return ..()
-	if(locked && (istype(W, /obj/item/weapon/card/emag)||istype(W, /obj/item/weapon/melee/energy/blade)))
+	if(istype(W, /obj/item/weapon/melee/energy/blade))
+		emag_act(INFINITY, user)
+	if(!opened)
+		src.togglelock(user)
+		return
+	return ..()
+
+/obj/structure/closet/crate/secure/emag_act(var/remaining_charges, var/mob/user)
+	if(!broken)
 		overlays.Cut()
 		overlays += emag
 		overlays += sparks
@@ -196,11 +204,7 @@
 		src.locked = 0
 		src.broken = 1
 		user << "<span class='notice'>You unlock \the [src].</span>"
-		return
-	if(!opened)
-		src.togglelock(user)
-		return
-	return ..()
+		return 1
 
 /obj/structure/closet/crate/secure/emp_act(severity)
 	for(var/obj/O in src)