[vala/0.50] gtk4: Update to 4.0.0+0fcf01dd

[Rico Tzschichholz <ricotz src gnome org>]

commit eb50b6399c9593f00061fa47e479e48a11456049
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Dec 28 20:38:57 2020 +0100

    gtk4: Update to 4.0.0+0fcf01dd

 vapi/gtk4.vapi | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
---
diff --git a/vapi/gtk4.vapi b/vapi/gtk4.vapi
index f76e4b161..2165b98ec 100644
--- a/vapi/gtk4.vapi
+++ b/vapi/gtk4.vapi
@@ -6227,7 +6227,7 @@ namespace Gsk {
        public class Transform {
                [CCode (has_construct_function = false)]
                public Transform ();
-               public bool equal (Gsk.Transform second);
+               public bool equal (Gsk.Transform? second);
                public Gsk.TransformCategory get_category ();
                [DestroysInstance]
                public Gsk.Transform? invert ();
@@ -7389,10 +7389,6 @@ namespace Gtk {
                public bool use_underline { get; set; }
                public virtual signal void toggled ();
        }
-       [CCode (cheader_filename = "gtk/gtk.h", has_type_id = false)]
-       [Compact]
-       public class Clipboard {
-       }
        [CCode (cheader_filename = "gtk/gtk.h", type_id = "gtk_closure_expression_get_type ()")]
        public class ClosureExpression : Gtk.Expression {
                [CCode (has_construct_function = false, type = "GtkExpression*")]
@@ -10393,7 +10389,7 @@ namespace Gtk {
                [NoAccessorMethod]
                public bool gtk_application_prefer_dark_theme { get; set; }
                [NoAccessorMethod]
-               public float gtk_cursor_aspect_ratio { get; set; }
+               public double gtk_cursor_aspect_ratio { get; set; }
                [NoAccessorMethod]
                public bool gtk_cursor_blink { get; set; }
                [NoAccessorMethod]