From 651b8ddac86fe91dee1506dc7c7bf90d79a957c3 Mon Sep 17 00:00:00 2001
From: Sylvain Berfini <Sylvain.Berfini@Belledonne-Communications.com>
Date: Wed, 21 Dec 2011 14:24:54 +0100
Subject: [PATCH] Fix conferencing issue if no sound card

---
 coreapi/linphonecore.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index ecbd18f28a..e9554b0a09 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -3801,6 +3801,9 @@ static MSFilter *get_dtmf_gen(LinphoneCore *lc){
 	if (lc->ringstream==NULL){
 		float amp=0.1;
 		MSSndCard *ringcard=lc->sound_conf.lsd_card ?lc->sound_conf.lsd_card : lc->sound_conf.ring_sndcard;
+		if (ringcard == NULL)
+			return NULL;
+
 		lc->ringstream=ring_start(NULL,0,ringcard);
 		ms_filter_call_method(lc->ringstream->gendtmf,MS_DTMF_GEN_SET_DEFAULT_AMPLITUDE,&amp);
 		lc->dmfs_playing_start_time=time(NULL);
-- 
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