avcodec/mpeg12dec: fix support for interlaced mpeg2 with missing last slice

[ffmpeg] / libavcodec / bitstream_filter.c

diff --git a/libavcodec/bitstream_filter.c b/libavcodec/bitstream_filter.c
index 3ee582fb28962176368d295c26d565cf04e404af..751b90d1d526c7ce4edc4e79ecb0554023513db3 100644 (file)
--- a/libavcodec/bitstream_filter.c
+++ b/libavcodec/bitstream_filter.c
@@ -26,7 +26,7 @@
 
 static AVBitStreamFilter *first_bitstream_filter = NULL;
 
-AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f)
+AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f)
 {
     if (f)
         return f->next;