[gnome-music/wip/mschraal/core] grltrackerplaylist: Use childcount for playlist count

[Marinus Schraal <mschraal src gnome org>]

commit cc194ab1bc7fc1e2753d3775aa15135486bee678
Author: Marinus Schraal <mschraal gnome org>
Date:   Sun Jul 14 10:37:16 2019 +0200

    grltrackerplaylist: Use childcount for playlist count
    
    Gives an immediate playlist size. Needs grilo-plugins!56.

 gnomemusic/grilowrappers/grltrackerplaylists.py | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gnomemusic/grilowrappers/grltrackerplaylists.py b/gnomemusic/grilowrappers/grltrackerplaylists.py
index a1058e4f..695733e6 100644
--- a/gnomemusic/grilowrappers/grltrackerplaylists.py
+++ b/gnomemusic/grilowrappers/grltrackerplaylists.py
@@ -18,6 +18,7 @@ class GrlTrackerPlaylists(GObject.GObject):
         Grl.METADATA_KEY_ALBUM_ARTIST,
         Grl.METADATA_KEY_ALBUM_DISC_NUMBER,
         Grl.METADATA_KEY_ARTIST,
+        Grl.METADATA_KEY_CHILDCOUNT,
         Grl.METADATA_KEY_CREATION_DATE,
         Grl.METADATA_KEY_COMPOSER,
         Grl.METADATA_KEY_DURATION,
@@ -246,6 +247,7 @@ class Playlist(GObject.GObject):
         if media:
             self.props.pl_id = media.get_id()
             self.props.title = utils.get_media_title(media)
+            self.props.count = media.get_childcount()
             self.props.creation_date = media.get_creation_date()
 
         self.props.query = query