Merged revisions 164350 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r164350 | file | 2008-12-15 14:11:21 -0400 (Mon, 15 Dec 2008) | 6 lines

  Do not try to unlock a non-existant channel if the transfer fails.
  (closes issue #13800)
  Reported by: dwagner
  Patches:
        asterisk-1.4.22-chan-sip-nullp.patch uploaded by tweety (license 608)
........

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@164351 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 37ae2ca24f56f61e8ad4c9464a0a480129ea5a3f..30d611cc1af20436b6c6fddd79a76faf0c28463c 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -18371,7 +18371,9 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
                        sip_pvt_unlock(p);
                        if (p->refer->refer_call) {
                                sip_pvt_unlock(p->refer->refer_call);
-                               ast_channel_unlock(p->refer->refer_call->owner);
+                               if (p->refer->refer_call->owner) {
+                                       ast_channel_unlock(p->refer->refer_call->owner);
+                               }
                        }
                        p->invitestate = INV_COMPLETED;
                        return -1;