Fix security camera consoles, hopefully (#13507)

code/modules/modular_computers/computers/modular_computer/core.dm

@@ -112,6 +112,11 @@
 	if(iscarbon(user))
 		playsound(src, 'sound/machines/pda_click.ogg', 20)
 
+/obj/item/modular_computer/CouldNotUseTopic(var/mob/user)
+	..()
+	if(user.machine == src)
+		user.unset_machine()
+
 /obj/item/modular_computer/emag_act(var/remaining_charges, var/mob/user)
 	if(computer_emagged)
 		to_chat(user, SPAN_WARNING("\The [src] has already been emagged."))

code/modules/modular_computers/file_system/programs/security/camera.dm

@@ -157,12 +157,11 @@
 	current_camera = null
 
 /datum/nano_module/camera_monitor/check_eye(var/mob/user as mob)
-	if(istype(ui_host(), /obj/machinery/computer))
-		var/obj/machinery/computer/C = ui_host()
-		if (C.use_check_and_message(user) || C.inoperable())
+	var/obj/item/modular_computer/MC = user.machine
+	if(istype(MC) && ui_host() == MC)
+		if(!MC.working || user.blinded || user.stat)
+			user.unset_machine()
 			return -1
-	if(user.blinded)
-		return -1
 	if(!current_camera)
 		return 0
 	var/viewflag = current_camera.check_eye(user)