[gnome-music/wip/jfelder/songeditor-gtk4: 6/32] utils: Add a setter for album disc number

[Jean Felder <jfelder src gnome org>]

commit 8913f0ddd28f1fa7c326a97982c7ef9adfa091bf
Author: Jean Felder <jfelder src gnome org>
Date:   Sun Nov 1 22:39:41 2020 +0100

    utils: Add a setter for album disc number

 gnomemusic/utils.py | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/gnomemusic/utils.py b/gnomemusic/utils.py
index e743e9d9e..8def105b5 100644
--- a/gnomemusic/utils.py
+++ b/gnomemusic/utils.py
@@ -195,6 +195,14 @@ def get_album_disc_nr(item: Grl.Media) -> str:
     return str(disc_nr)
 
 
+def set_album_disc_nr(item: Grl.Media, disc_nr: str) -> None:
+    """Set the album song number of the media item.
+
+    :param Grl.Media item: A Grilo Media object
+    """
+    item.set_album_disc_number(int(disc_nr))
+
+
 def get_media_track_nr(item: Grl.Media) -> str:
     """Returns the track number of the media item.