Make sure the header value used to avoid repeating headers on seeking to the

start and to avoid initializing codecs with missing headers is set for all streams.
Fixes issue 1723.

Originally committed as revision 21693 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/oggdec.c

@@ -370,10 +370,10 @@ ogg_packet (AVFormatContext * s, int *str, int *dstart, int *dsize)
     ogg->curidx = idx;
     os->incomplete = 0;
 
-    if (os->header < 0){
+    if (!ogg->headers){
         int hdr = os->codec->header (s, idx);
+        os->header = os->seq;
         if (!hdr){
-            os->header = os->seq;
             os->segp = segp;
             os->psize = psize;
             ogg->headers = 1;