Makes so that vr chairs don't work without power (#9725)

code/game/machinery/deployable.dm

@@ -351,6 +351,13 @@ for reference:
 	kit_product = /obj/structure/bed/chair/remote/mech/portable
 	assembly_time = 20 SECONDS
 
+/obj/item/deployable_kit/remote_mech/attack_self(mob/user)
+	var/area/A = get_area(user)
+	if(!A.powered(EQUIP))
+		to_chat(user, SPAN_WARNING("\The [src] can not be deployed in an unpowered area."))
+		return FALSE
+	..()
+
 /obj/item/deployable_kit/remote_mech/brig
 	name = "brig mech control centre assembly kit"
 	desc = "A quick assembly kit to put together a brig mech control centre."

code/game/objects/structures/vr/_remote_chair.dm

@@ -11,6 +11,10 @@
 	if(portable_type)
 		name = "portable [name]"
 
+/obj/structure/bed/chair/remote/Destroy()
+	STOP_PROCESSING(SSprocessing, src)
+	return ..()
+
 /obj/structure/bed/chair/remote/examine(mob/user)
 	..()
 	if(portable_type)
@@ -32,12 +36,25 @@
 
 /obj/structure/bed/chair/remote/user_buckle_mob(mob/user)
 	..()
+	var/area/A = get_area(src)
+	if(!A.powered(EQUIP))
+		to_chat(user, SPAN_WARNING("\The [src] is not powered."))
+		return FALSE
 	if(ishuman(user))
 		var/mob/living/carbon/human/H = user
 		if(H.old_mob)
 			to_chat(H, SPAN_WARNING("The chair rejects you! You cannot recursively control bodies."))
 			return
 	add_overlay(image('icons/obj/furniture.dmi', src, "vr_helmet", MOB_LAYER + 1))
+	START_PROCESSING(SSprocessing, src)
+
+
+/obj/structure/bed/chair/remote/process()
+	..()
+	if(buckled_mob)
+		var/area/A = get_area(src)
+		if(!A.powered(EQUIP))
+			user_unbuckle_mob(buckled_mob)
 
 // Return to our body in the unfortunate event that we get unbuckled while plugged in
 /obj/structure/bed/chair/remote/user_unbuckle_mob(mob/user)
@@ -46,4 +63,5 @@
 		if(istype(M) && M.vr_mob)
 			M.vr_mob.body_return()
 		cut_overlays()
+		STOP_PROCESSING(SSprocessing, src)
 	..()