mpegaudiodec: fix compilation when testing the unchecked bitstream reader

libavcodec/mpegaudiodec.c

@@ -1548,7 +1548,7 @@ static int mp_decode_layer3(MPADecodeContext *s)
         memcpy(s->last_buf + s->last_buf_size, ptr, EXTRABYTES);
         s->in_gb = s->gb;
         init_get_bits(&s->gb, s->last_buf, s->last_buf_size*8);
-#if CONFIG_SAFE_BITSTREAM_READER
+#if !UNCHECKED_BITSTREAM_READER
         s->gb.size_in_bits_plus8 += EXTRABYTES * 8;
 #endif
         skip_bits_long(&s->gb, 8*(s->last_buf_size - main_data_begin));