TT#14008 handle NULL selected_sfd in rtcp_send_report

closes #1404

Change-Id: I282db8287f31d49eb26f0baf01951187577d7890
(cherry picked from commit 835ba08b5f)

daemon/rtcp.c

@@ -1571,6 +1571,9 @@ void rtcp_send_report(struct call_media *media, struct ssrc_ctx *ssrc_out) {
 			ps = next_ps;
 	}
 
+	if (!ps->selected_sfd)
+		return;
+
 	media_update_stats(media);
 
 	log_info_stream_fd(ps->selected_sfd);