playlist: Simplify playlist modified detection

Any modifications to the playlist (insert, delete, shuffle, etc)
will cause the modified flag to be set. The flag is cleared when
the playlist is saved. Code that generates playlists can manually
clear the modified flag if appropriate; there is now a proper API
for this so the tagcache and pictureflow don't need to resort to
hacks.

Change-Id: I8d3c723265a41db07a13de3f1d2abb0444528d57

1 files changed, 1 insertions, 1 deletions

diff --git a/apps/tagtree.c b/apps/tagtree.c
index 72eec1494c..e715d4518b 100644
--- a/apps/tagtree.c
+++ b/apps/tagtree.c
@@ -2359,7 +2359,7 @@ static int tagtree_play_folder(struct tree_context* c)
     }
 
     playlist_start(start_index, 0, 0);
-    playlist_get_current()->num_inserted_tracks = 0; /* make warn on playlist erase work */
+    playlist_set_modified(NULL, false);
     return 0;
 }