avcodec/ac3dec_fixed: add missingAVprefix to CODEC_ID

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Nedeljko Babic <nbabic@mips.com>

libavcodec/ac3dec_fixed.c

@@ -163,7 +163,7 @@ static const AVClass ac3_decoder_class = {
 AVCodec ff_ac3_fixed_decoder = {
     .name           = "ac3_fixed",
     .type           = AVMEDIA_TYPE_AUDIO,
-    .id             = CODEC_ID_AC3,
+    .id             = AV_CODEC_ID_AC3,
     .priv_data_size = sizeof (AC3DecodeContext),
     .init           = ac3_decode_init,
     .close          = ac3_decode_end,