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, 2 insertions, 2 deletions

diff --git a/src/playlist.h b/src/playlist.h
index 2be2711e5..f4df8ce41 100644
--- a/src/playlist.h
+++ b/src/playlist.h
@@ -57,7 +57,7 @@ enum playlist_result addToPlaylist(const char *file, int *added_id);
 
 int addToStoredPlaylist(const char *file, const char *utf8file);
 
-enum playlist_result addSongToPlaylist(Song * song, int *added_id);
+enum playlist_result addSongToPlaylist(struct mpd_song * song, int *added_id);
 
 void showPlaylist(int fd);
 
@@ -93,7 +93,7 @@ enum playlist_result savePlaylist(const char *utf8file);
 
 enum playlist_result deletePlaylist(const char *utf8file);
 
-void deleteASongFromPlaylist(const Song * song);
+void deleteASongFromPlaylist(const struct mpd_song * song);
 
 enum playlist_result moveSongInPlaylist(int from, int to);