flac: use get_bits_longlong()

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/flac.c

@@ -206,8 +206,7 @@ void avpriv_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *
     avctx->sample_rate = s->samplerate;
     avctx->bits_per_raw_sample = s->bps;
 
-    s->samples  = get_bits_long(&gb, 32) << 4;
-    s->samples |= get_bits(&gb, 4);
+    s->samples = get_bits_longlong(&gb, 36);
 
     skip_bits_long(&gb, 64); /* md5 sum */
     skip_bits_long(&gb, 64); /* md5 sum */