From 4e4552d65f247335672946541db690a8612d7e2e Mon Sep 17 00:00:00 2001
From: Kurtis Heimerl <kurtis.heimerl@rangenetworks.com>
Date: Thu, 31 May 2012 02:44:12 +0000
Subject: [PATCH] attempting to fix #937 in public, basically forgot to check
 if sip_method exists.

git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@3700 19bc5d8c-e614-43d4-8b26-e1612bc8e597
---
 SIP/SIPEngine.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/SIP/SIPEngine.cpp b/SIP/SIPEngine.cpp
index fae102d..42751aa 100644
--- a/SIP/SIPEngine.cpp
+++ b/SIP/SIPEngine.cpp
@@ -736,8 +736,8 @@ SIPState SIPEngine::MODWaitForUNAVAILACK()
 			osip_message_t * ack = gSIPInterface.read(mCallID, gConfig.getNum("SIP.Timer.E"));
 			responded = true;
 			saveResponse(ack);
-			if (!strncmp(ack->sip_method,"ACK", 4)) {
-				LOG(WARNING) << "unexpected " << ack->sip_method << " response to UNAVAIL, from proxy " << mProxyIP << ":" << mProxyPort << ". Assuming other end has cleared";
+			if ((NULL == ack->sip_method) || !strncmp(ack->sip_method,"ACK", 4)) {
+				LOG(WARNING) << "unexpected response to UNAVAIL, from proxy " << mProxyIP << ":" << mProxyPort << ". Assuming other end has cleared";
 			}
 			osip_message_free(ack);
 			break;