[vala/staging] gtk4: Update to 4.5.0~da5efea6

[Rico Tzschichholz <ricotz src gnome org>]

commit 21d26fdabb6e0139991e9eb63d3a44610204a69e
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Sep 29 17:38:33 2021 +0200

    gtk4: Update to 4.5.0~da5efea6

 vapi/gtk4.vapi | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/vapi/gtk4.vapi b/vapi/gtk4.vapi
index 24dc15de7..1b1907b38 100644
--- a/vapi/gtk4.vapi
+++ b/vapi/gtk4.vapi
@@ -7693,10 +7693,10 @@ namespace Gtk {
        public class ConstraintGuide : GLib.Object, Gtk.ConstraintTarget {
                [CCode (has_construct_function = false)]
                public ConstraintGuide ();
-               public void get_max_size (int? width, int? height);
-               public void get_min_size (int? width, int? height);
+               public void get_max_size (out int width, out int height);
+               public void get_min_size (out int width, out int height);
                public unowned string? get_name ();
-               public void get_nat_size (int? width, int? height);
+               public void get_nat_size (out int width, out int height);
                public Gtk.ConstraintStrength get_strength ();
                public void set_max_size (int width, int height);
                public void set_min_size (int width, int height);