From b2a869489ca3662ac7dde740a7c85a58eb53f288 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@centraldogma>
Date: Fri, 11 Nov 2011 05:48:48 +0100
Subject: [PATCH] audiohda: fix null pointer dereference

---
 sys/src/9/pc/audiohda.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/src/9/pc/audiohda.c b/sys/src/9/pc/audiohda.c
index ca108d7e9..09184730a 100644
--- a/sys/src/9/pc/audiohda.c
+++ b/sys/src/9/pc/audiohda.c
@@ -572,7 +572,7 @@ findpath(Widget *src)
 			break;
 		for(i=0; i<w->nlist; i++){
 			v = w->list[i];
-			if(v->from)
+			if(v == nil || v->from)
 				continue;
 			v->from = w;
 			q[r++] = v;