Avoid 100% CPU useage at EOF.

Originally committed as revision 18625 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffplay.c

@@ -2079,6 +2079,7 @@ static int decode_thread(void *arg)
             pkt->size=0;
             pkt->stream_index= is->video_stream;
             packet_queue_put(&is->videoq, pkt);
+            SDL_Delay(10);
             continue;
         }
         ret = av_read_frame(ic, pkt);