Playlist Catalogue: fix: "Save Current Playlist" may fail silently

- After rebooting, unless the current playlist
had been manually resumed already, the "Save
Current Playlist" option in the root menu's/
playlist catalogue's context menu failed to work.

- Eliminate error message attempting to view current
playlist when no control file present.

Change-Id: I58f1d3dc6f256fcee106ff5a17f69fa46d67b2e4

apps/playlist.c

@@ -2048,6 +2048,7 @@ struct playlist_info* playlist_load(const char* dir, const char* file,
     {
         playlist->max_playlist_size = current_playlist.max_playlist_size;
         playlist->indices = current_playlist.indices;
+        current_playlist.started = false;
     }
 
     new_playlist_unlocked(playlist, dir, file);