[vala] gtk+-4.0: Update to 3.91.2

[Rico Tzschichholz <ricotz src gnome org>]

commit 172d545567991fd104d3e2c7a90809c1356c94e1
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Aug 9 13:25:28 2017 +0200

    gtk+-4.0: Update to 3.91.2

 vapi/gtk+-4.0.vapi |   28 +++++++++-------------------
 1 files changed, 9 insertions(+), 19 deletions(-)
---
diff --git a/vapi/gtk+-4.0.vapi b/vapi/gtk+-4.0.vapi
index 7ac8895..cb798d1 100644
--- a/vapi/gtk+-4.0.vapi
+++ b/vapi/gtk+-4.0.vapi
@@ -7240,7 +7240,7 @@ namespace Gtk {
                [Version (since = "3.6")]
                public void set_accel (uint accelerator_key, Gdk.ModifierType accelerator_mods);
                public void set_accel_closure ([CCode (type = "GClosure*")] owned Gtk.AccelGroupActivate 
accel_closure);
-               public void set_accel_widget (Gtk.Widget accel_widget);
+               public void set_accel_widget (Gtk.Widget? accel_widget);
                public void set_label (string text);
                public void set_use_underline (bool setting);
                [NoAccessorMethod]
@@ -7587,7 +7587,7 @@ namespace Gtk {
        public abstract class Bin : Gtk.Container, Atk.Implementor, Gtk.Buildable {
                [CCode (has_construct_function = false)]
                protected Bin ();
-               public unowned Gtk.Widget get_child ();
+               public unowned Gtk.Widget? get_child ();
        }
        [CCode (cheader_filename = "gtk/gtk.h", has_type_id = false)]
        [Compact]
@@ -8392,19 +8392,19 @@ namespace Gtk {
                [Version (since = "3.92")]
                public Gtk.BaselinePosition get_baseline_position ();
                [Version (since = "3.92")]
-               public unowned Gtk.Widget get_center_widget ();
+               public unowned Gtk.Widget? get_center_widget ();
                [Version (since = "3.92")]
-               public unowned Gtk.Widget get_end_widget ();
+               public unowned Gtk.Widget? get_end_widget ();
                [Version (since = "3.92")]
-               public unowned Gtk.Widget get_start_widget ();
+               public unowned Gtk.Widget? get_start_widget ();
                [Version (since = "3.92")]
                public void set_baseline_position (Gtk.BaselinePosition position);
                [Version (since = "3.92")]
-               public void set_center_widget (Gtk.Widget child);
+               public void set_center_widget (Gtk.Widget? child);
                [Version (since = "3.92")]
-               public void set_end_widget (Gtk.Widget child);
+               public void set_end_widget (Gtk.Widget? child);
                [Version (since = "3.92")]
-               public void set_start_widget (Gtk.Widget child);
+               public void set_start_widget (Gtk.Widget? child);
                public Gtk.BaselinePosition baseline_position { get; set; }
        }
        [CCode (cheader_filename = "gtk/gtk.h", type_id = "gtk_check_button_get_type ()")]
@@ -9209,16 +9209,6 @@ namespace Gtk {
                [CCode (has_construct_function = false)]
                protected EntryIconAccessible ();
        }
-       [CCode (cheader_filename = "gtk/gtk.h", type_id = "gtk_event_box_get_type ()")]
-       public class EventBox : Gtk.Bin, Atk.Implementor, Gtk.Buildable {
-               [CCode (has_construct_function = false, type = "GtkWidget*")]
-               public EventBox ();
-               [Version (since = "2.4")]
-               public bool get_above_child ();
-               [Version (since = "2.4")]
-               public void set_above_child (bool above_child);
-               public bool above_child { get; set; }
-       }
        [CCode (cheader_filename = "gtk/gtk.h", type_id = "gtk_event_controller_get_type ()")]
        public abstract class EventController : GLib.Object {
                [CCode (has_construct_function = false)]
@@ -14418,7 +14408,7 @@ namespace Gtk {
                public double get_opacity ();
                public unowned Pango.Context get_pango_context ();
                public unowned Gtk.Widget? get_parent ();
-               public unowned Gdk.Window get_parent_window ();
+               public unowned Gdk.Window? get_parent_window ();
                public unowned Gtk.WidgetPath get_path ();
                [Version (since = "3.0")]
                public void get_preferred_size (out Gtk.Requisition minimum_size, out Gtk.Requisition 
natural_size);