more correct error message

Originally committed as revision 7655 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/asf.c

@@ -817,7 +817,7 @@ static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos,
     asf_reset_header(s);
     for(;;){
         if (av_read_frame(s, pkt) < 0){
-            av_log(s, AV_LOG_INFO, "seek failed\n");
+            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
             return AV_NOPTS_VALUE;
         }