wmv1 header parser (unfinished)

Originally committed as revision 380 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/utils.c

@@ -429,6 +429,7 @@ void avcodec_register_all(void)
     register_avcodec(&msmpeg4v1_decoder);
     register_avcodec(&msmpeg4v2_decoder);
     register_avcodec(&msmpeg4v3_decoder);
+    register_avcodec(&wmv1_decoder);
     register_avcodec(&mpeg_decoder);
     register_avcodec(&h263i_decoder);
     register_avcodec(&rv10_decoder);