[lightsoff/ricotz/vala] Reference of [GtkChild] fields is handled by GtkBuilder, type must be unowned

[Rico Tzschichholz <ricotz src gnome org>]

commit fa339188724483dd176aa606c1c1f5f560baa28c
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Mar 17 12:10:45 2021 +0100

    Reference of [GtkChild] fields is handled by GtkBuilder, type must be unowned

 src/lightsoff-window.vala       | 16 ++++++++--------
 src/notifications-revealer.vala |  2 +-
 2 files changed, 9 insertions(+), 9 deletions(-)
---
diff --git a/src/lightsoff-window.vala b/src/lightsoff-window.vala
index 06dea3b..7cf3d8c 100644
--- a/src/lightsoff-window.vala
+++ b/src/lightsoff-window.vala
@@ -15,14 +15,14 @@ using Gtk;
 [GtkTemplate (ui = "/org/gnome/LightsOff/ui/lightsoff.ui")]
 private class LightsoffWindow : ManagedWindow
 {
-    [GtkChild] private HeaderBar                headerbar;
-    [GtkChild] private MenuButton               menu_button;
-    [GtkChild] private Label                    level_label;
-    [GtkChild] private GameButton               game_button_1;
-    [GtkChild] private GameButton               game_button_2;
-    [GtkChild] private AspectFrame              aspect_frame;
-    [GtkChild] private Revealer                 revealer;
-    [GtkChild] private NotificationsRevealer    notifications_revealer;
+    [GtkChild] private unowned HeaderBar                headerbar;
+    [GtkChild] private unowned MenuButton               menu_button;
+    [GtkChild] private unowned Label                    level_label;
+    [GtkChild] private unowned GameButton               game_button_1;
+    [GtkChild] private unowned GameButton               game_button_2;
+    [GtkChild] private unowned AspectFrame              aspect_frame;
+    [GtkChild] private unowned Revealer                 revealer;
+    [GtkChild] private unowned NotificationsRevealer    notifications_revealer;
 
     private GLib.Settings settings;
     private GameView game_view;
diff --git a/src/notifications-revealer.vala b/src/notifications-revealer.vala
index 305eea0..d4312bd 100644
--- a/src/notifications-revealer.vala
+++ b/src/notifications-revealer.vala
@@ -20,7 +20,7 @@ using Gtk;
 [GtkTemplate (ui = "/org/gnome/LightsOff/ui/notifications-revealer.ui")]
 private class NotificationsRevealer : Revealer
 {
-    [GtkChild] private Label notification_label;
+    [GtkChild] private unowned Label notification_label;
 
     construct
     {