avcodec/binkaudio: Use assert instead of return for use of compile time disabled codecs

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/binkaudio.c

@@ -139,7 +139,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
     else if (CONFIG_BINKAUDIO_DCT_DECODER)
         ff_dct_init(&s->trans.dct, frame_len_bits, DCT_III);
     else
-        return -1;
+        av_assert0(0);
 
     s->pkt = av_packet_alloc();
     if (!s->pkt)