song: converted typedef Song to struct song

Again, a data type which can be forward-declared.

[ew:
 * used "struct mpd_song" instead to avoid token duplication
   (like I did with "struct mpd_tag") as there's no good
   abbreviation for "song" and identical tokens on the same
   line don't read well
 * rewritten using
     perl -i -p -e 's/\bSong\b/struct mpd_song/g' src/*.[ch]
   since it was too hard to merge
 * also, I don't care much for forward declarations
]

1 files changed, 1 insertions, 1 deletions

diff --git a/src/stats.c b/src/stats.c
index 4555907db..f200a48b3 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -40,7 +40,7 @@ struct visit_data {
 	struct strset *set;
 };
 
-static int visit_tag_items(Song *song, void *_data)
+static int visit_tag_items(struct mpd_song *song, void *_data)
 {
 	const struct visit_data *data = _data;
 	unsigned i;