Merged revisions 290542 via svnmerge from

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

........
  r290542 | twilson | 2010-10-05 21:35:51 -0700 (Tue, 05 Oct 2010) | 6 lines
  
  Don't try to send RTP when remote_address is null
  
  It is possible for ast_rtp_stop() to be called which will clear the remote
  address and cause the sendto to fail and spam warnings. Don't send in this
  case.
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@290543 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_rtp_asterisk.c

@@ -1945,6 +1945,11 @@ static int bridge_p2p_rtp_write(struct ast_rtp_instance *instance, unsigned int
 
 	ast_rtp_instance_get_remote_address(instance1, &remote_address);
 
+	if (ast_sockaddr_isnull(&remote_address)) {
+		ast_debug(1, "Remote address is null, most likely RTP has been stopped\n");
+		return 0;
+	}
+
 	/* Send the packet back out */
 	res = rtp_sendto(instance1, (void *)rtpheader, len, 0, &remote_address);
 	if (res < 0) {