From e16a0cb08059b0eb8ed09374d0310d8873f4a7df Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 2 Sep 2005 17:01:32 +0000
Subject: [PATCH] Fix segfault of envy24control

Fix segfault of envy24control.
---
 envy24control/midi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/envy24control/midi.c b/envy24control/midi.c
index c01b84c..327f6cf 100644
--- a/envy24control/midi.c
+++ b/envy24control/midi.c
@@ -142,6 +142,10 @@ static void do_controller(int c, int v)
 int midi_controller(int c, int v)
 {
   int v2;
+
+  if (! seq)
+    return 0;
+
   if(c<0 || c>127) return 0;
 
   if(v<0) v=0;
-- 
2.47.1