Merged revisions 321392 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

........
  r321392 | rmudgett | 2011-05-27 18:45:41 -0500 (Fri, 27 May 2011) | 12 lines

  Crash when using hagi and no servers are available.

  When none of the servers returned by the SRV querey respond, asterisk
  crashes.  The problem is that if the loop over all the SRV entries
  finishes then the srv_context has already been cleaned up.

  * Make ast_srv_cleanup() check to see if the context is already cleaned
  up.

  (closes issue #19256)
  Reported by: byronclark
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@321393 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/srv.c

@@ -249,7 +249,11 @@ void ast_srv_cleanup(struct srv_context **context)
 	const char *host;
 	unsigned short port;
 
-	while (!(ast_srv_lookup(context, NULL, &host, &port)));
+	if (*context) {
+		/* We have a context to clean up. */
+		while (!(ast_srv_lookup(context, NULL, &host, &port))) {
+		}
+	}
 }
 
 int ast_get_srv(struct ast_channel *chan, char *host, int hostlen, int *port, const char *service)