.memleak fix by Ronald Bultje. OK'd by Luca.

Originally committed as revision 9697 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rtsp.c

@@ -814,6 +814,8 @@ static void rtsp_send_cmd(AVFormatContext *s,
     }
     if (content_ptr)
         *content_ptr = content;
+    else
+        av_free(content);
 }