song: added song_in_database()

Some functions assume that a song is not in the database when it is a
remote song.  Based on that, they decide whether they are responsible
for freeing the song struct.  Add a special function which checks
whether a song is in the database (currently equal to song_is_file()).

1 files changed, 7 insertions, 1 deletions

diff --git a/src/song.h b/src/song.h
index 7d174c51..6016b8d9 100644
--- a/src/song.h
+++ b/src/song.h
@@ -68,9 +68,15 @@ char *
 song_get_url(const struct song *song, char *path_max_tmp);
 
 static inline bool
-song_is_file(const struct song *song)
+song_in_database(const struct song *song)
 {
 	return song->parent != NULL;
 }
 
+static inline bool
+song_is_file(const struct song *song)
+{
+	return song_in_database(song);
+}
+
 #endif