From fe448ac8a74cc4629a4596325d25e2dd8c26fba3 Mon Sep 17 00:00:00 2001
From: George Joseph <george.joseph@fairview5.com>
Date: Mon, 4 Apr 2016 17:02:09 -0600
Subject: [PATCH] res_pjsip_mwi:  Fix segv caused by
 16c7d8e74a9af13f98c3c22aa9c43ce39965f6b7

I forgot the new voicemail_extension wasn't a stringfield and didn't check
for NULL where I should have.

Change-Id: I029482d5c2ab72474838750461bd46b0809c90fb
---
 res/res_pjsip_mwi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/res/res_pjsip_mwi.c b/res/res_pjsip_mwi.c
index 8735a78428..64d3c84eaf 100644
--- a/res/res_pjsip_mwi.c
+++ b/res/res_pjsip_mwi.c
@@ -459,7 +459,8 @@ static struct ast_sip_aor *find_aor_for_resource(struct ast_sip_endpoint *endpoi
 			continue;
 		}
 
-		if (!strcasecmp(check_aor->voicemail_extension, resource)) {
+		if (!ast_strlen_zero(check_aor->voicemail_extension)
+			&& !strcasecmp(check_aor->voicemail_extension, resource)) {
 			ast_debug(1, "Found an aor (%s) that matches voicemail_extension %s\n", aor_name, resource);
 			return check_aor;
 		}
-- 
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