[vala/0.52] gtk4: Backport fixes from 0.54.2

[Rico Tzschichholz <ricotz src gnome org>]

commit 67e25c2510b76adb17c776992da3ca749c920ce8
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Sep 29 17:38:33 2021 +0200

    gtk4: Backport fixes from 0.54.2

 vapi/gtk4.vapi | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/vapi/gtk4.vapi b/vapi/gtk4.vapi
index 91062566c..d698551e3 100644
--- a/vapi/gtk4.vapi
+++ b/vapi/gtk4.vapi
@@ -4800,7 +4800,7 @@ namespace Gdk {
                public unowned Gdk.Display get_display ();
                public unowned Gdk.ContentFormats get_formats ();
                public bool is_local ();
-               public async GLib.InputStream? read_async (string mime_types, int io_priority, 
GLib.Cancellable? cancellable, out unowned string out_mime_type) throws GLib.Error;
+               public async GLib.InputStream? read_async ([CCode (array_length = false, 
array_null_terminated = true)] string[] mime_types, int io_priority, GLib.Cancellable? cancellable, out 
unowned string out_mime_type) throws GLib.Error;
                public async string? read_text_async (GLib.Cancellable? cancellable) throws GLib.Error;
                public async Gdk.Texture? read_texture_async (GLib.Cancellable? cancellable) throws 
GLib.Error;
                public async unowned GLib.Value? read_value_async (GLib.Type type, int io_priority, 
GLib.Cancellable? cancellable) throws GLib.Error;
@@ -7634,10 +7634,10 @@ 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);
@@ -12213,7 +12213,7 @@ namespace Gtk {
                public GLib.ListModel observe_controllers ();
                public unowned Gtk.Widget? pick (double x, double y, Gtk.PickFlags flags);
                [CCode (cname = "gtk_widget_class_query_action")]
-               public class bool query_action (uint index_, out GLib.Type owner, out string action_name, out 
GLib.VariantType? parameter_type, out string? property_name);
+               public class bool query_action (uint index_, out GLib.Type owner, out unowned string 
action_name, out unowned GLib.VariantType? parameter_type, out unowned string? property_name);
                public void queue_allocate ();
                public void queue_draw ();
                public void queue_resize ();