Set subtitle codec id correctly, i hope this does not break anything.

Originally committed as revision 11627 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/mov.c

@@ -233,7 +233,6 @@ static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
         st->codec->codec_id = CODEC_ID_MP2;
     else if(type == MKTAG('s', 'u', 'b', 'p')) {
         st->codec->codec_type = CODEC_TYPE_SUBTITLE;
-        st->codec->codec_id = CODEC_ID_DVD_SUBTITLE;
     }
     get_be32(pb); /* component  manufacture */
     get_be32(pb); /* component flags */
@@ -788,6 +787,8 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
                 st->codec->bits_per_sample = bits_per_sample;
                 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
             }
+        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
+            st->codec->codec_id= id;
         } else {
             /* other codec type, just skip (rtp, mp4s, tmcd ...) */
             url_fskip(pb, size - (url_ftell(pb) - start_pos));