[source_avcodec] use a const pointer for AVCodec

diff --git a/src/io/source_avcodec.c b/src/io/source_avcodec.c
index 011c3d7..bac74a5 100644 (file)
--- a/src/io/source_avcodec.c
+++ b/src/io/source_avcodec.c
@@ -130,7 +130,7 @@ aubio_source_avcodec_t * new_aubio_source_avcodec(const char_t * path,
   AVCodecParameters *codecpar;
 #endif
 
-  AVCodec *codec;
+  const AVCodec *codec;
   uint_t i;
   int err;
   if (path == NULL) {