[gnome-music/wip/jfelder/songeditor-gtk4: 7/32] utils: Add a setter for a media track number

[Jean Felder <jfelder src gnome org>]

commit 92857e642b99c3da080e24db393789163e91bf19
Author: Jean Felder <jfelder src gnome org>
Date:   Sun Nov 1 22:47:58 2020 +0100

    utils: Add a setter for a media track number

 gnomemusic/utils.py | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/gnomemusic/utils.py b/gnomemusic/utils.py
index 8def105b5..f1bf34e1e 100644
--- a/gnomemusic/utils.py
+++ b/gnomemusic/utils.py
@@ -217,6 +217,14 @@ def get_media_track_nr(item: Grl.Media) -> str:
     return str(track_nr)
 
 
+def set_media_track_nr(item: Grl.Media, track_nr: str) -> None:
+    """Set the track number of the media item.
+
+    :param Grl.Media item: A Grilo Media object
+    """
+    item.set_track_number(int(track_nr))
+
+
 def seconds_to_string(duration):
     """Convert a time in seconds to a mm:ss string