From 47295f541ce652feaf008e8879ce7ae58e84987b Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sat, 22 Nov 2014 20:33:12 +0100
Subject: [PATCH] Nocturn: Do not write to a missing USB device

---
 nocturn.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nocturn.c b/nocturn.c
index ba5edf2..158f140 100644
--- a/nocturn.c
+++ b/nocturn.c
@@ -270,7 +270,7 @@ static void noct_do_write(uint cmd, uint arg)
 
 static void noct_sched_write(void)
 {
-  if (noct_write_pending)
+  if (!usb_dev || noct_write_pending)
     return;
 
   if (noct_dirty_button)
-- 
2.39.2