Refactors machine_stat and is_processing() to process on demand (#53150)

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

@@ -100,13 +100,13 @@
 		visible_message("<span class='danger'>\The [src]'s screen flickers [battery_module ? "\"BATTERY [malfunction ? "MALFUNCTION" : "CRITICAL"]\"" : "\"EXTERNAL POWER LOSS\""] warning as it shuts down unexpectedly.</span>")
 		if(cpu)
 			cpu.shutdown_computer(0)
-	machine_stat |= NOPOWER
+	set_machine_stat(machine_stat | NOPOWER)
 	update_icon()
 
 // Modular computers can have battery in them, we handle power in previous proc, so prevent this from messing it up for us.
 /obj/machinery/modular_computer/power_change()
 	if(cpu && cpu.use_power()) // If MC_CPU still has a power source, PC wouldn't go offline.
-		machine_stat &= ~NOPOWER
+		set_machine_stat(machine_stat & ~NOPOWER)
 		update_icon()
 		return
 	. = ..()

code/modules/modular_computers/file_system/programs/antagonist/dos.dm

@@ -25,7 +25,7 @@
 			dos_speed = NTNETSPEED_ETHERNET * 10
 	if(target && executed)
 		target.dos_overload += dos_speed
-		if(!target.is_operational())
+		if(!target.is_operational)
 			target.dos_sources.Remove(src)
 			target = null
 			error = "Connection to destination relay lost."