Fix IAX2 incoming call address lookups

This fixes address lookup for incoming calls without a peer definition.
The address family was unset instead of being set to AST_AF_UNSPEC
which was causing lookup failures on "127.0.0.1". This is one of the
causes of the current failure of the app_page integration test.

Review: https://reviewboard.asterisk.org/r/2933/
........

Merged revisions 401291 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@401292 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -4491,6 +4491,7 @@ static int create_addr(const char *peername, struct ast_channel *c, struct ast_s
 	if (!(peer = find_peer(peername, 1))) {
 		struct ast_sockaddr peer_addr;
 
+		peer_addr.ss.ss_family = AST_AF_UNSPEC;
 		cai->found = 0;
 		if (ast_get_ip_or_srv(&peer_addr, peername, srvlookup ? "_iax._udp" : NULL)) {
 			ast_log(LOG_WARNING, "No such host: %s\n", peername);