Specify the server address when opening an rtp:// URL in rtsp.c, so

that the correct local address can be used for binding the socket.
Fixes rtsp:// URLs in ffplay on MacOS X

Patch by Ronald Bultje (rsbultje at gmail dot com)

Originally committed as revision 10940 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rtsp.c

@@ -933,7 +933,7 @@ static int rtsp_read_header(AVFormatContext *s,
             /* first try in specified port range */
             if (RTSP_RTP_PORT_MIN != 0) {
                 while(j <= RTSP_RTP_PORT_MAX) {
-                    snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
+                    snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
                     j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
                     if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
                         goto rtp_opened;