add "is_cd" flag to CUESHEET everywhere
diff --git a/src/libFLAC/metadata_object.c b/src/libFLAC/metadata_object.c
index 439902c..49d37f5 100644
--- a/src/libFLAC/metadata_object.c
+++ b/src/libFLAC/metadata_object.c
@@ -207,6 +207,7 @@
 	object->length = (
 		FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN +
 		FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN +
+		FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN +
 		FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN +
 		FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN
 	) / 8;
@@ -586,6 +587,9 @@
 	if(block1->lead_in != block2->lead_in)
 		return false;
 
+	if(block1->is_cd != block2->is_cd)
+		return false;
+
 	if(block1->num_tracks != block2->num_tracks)
 		return false;