[vala/staging] vapi: Update GIR-based bindings

[Rico Tzschichholz <ricotz src gnome org>]

commit f4aaa95ceb7c7f5d5b125e10ea725e10e7140eaa
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Apr 5 22:29:00 2020 +0200

    vapi: Update GIR-based bindings

 vapi/gio-2.0.vapi | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)
---
diff --git a/vapi/gio-2.0.vapi b/vapi/gio-2.0.vapi
index daa566e42..b7f5b0973 100644
--- a/vapi/gio-2.0.vapi
+++ b/vapi/gio-2.0.vapi
@@ -2994,14 +2994,14 @@ namespace GLib {
                [CCode (has_construct_function = false)]
                protected TlsConnection ();
                public bool emit_accept_certificate (GLib.TlsCertificate peer_cert, GLib.TlsCertificateFlags 
errors);
-               public unowned GLib.TlsCertificate get_certificate ();
+               public unowned GLib.TlsCertificate? get_certificate ();
                [Version (since = "2.30")]
-               public unowned GLib.TlsDatabase get_database ();
+               public unowned GLib.TlsDatabase? get_database ();
                [Version (since = "2.30")]
-               public unowned GLib.TlsInteraction get_interaction ();
+               public unowned GLib.TlsInteraction? get_interaction ();
                [Version (since = "2.60")]
                public unowned string? get_negotiated_protocol ();
-               public unowned GLib.TlsCertificate get_peer_certificate ();
+               public unowned GLib.TlsCertificate? get_peer_certificate ();
                public GLib.TlsCertificateFlags get_peer_certificate_errors ();
                [Version (deprecated = true, deprecated_since = "2.60.", since = "2.28")]
                public GLib.TlsRehandshakeMode get_rehandshake_mode ();
@@ -3014,7 +3014,7 @@ namespace GLib {
                public void set_advertised_protocols ([CCode (array_length = false, array_null_terminated = 
true)] string[]? protocols);
                public void set_certificate (GLib.TlsCertificate certificate);
                [Version (since = "2.30")]
-               public void set_database (GLib.TlsDatabase database);
+               public void set_database (GLib.TlsDatabase? database);
                [Version (since = "2.30")]
                public void set_interaction (GLib.TlsInteraction? interaction);
                [Version (deprecated = true, deprecated_since = "2.60.", since = "2.28")]
@@ -3486,12 +3486,12 @@ namespace GLib {
                public bool close (GLib.Cancellable? cancellable = null) throws GLib.Error;
                public async bool close_async (int io_priority = GLib.Priority.DEFAULT, GLib.Cancellable? 
cancellable = null) throws GLib.Error;
                public bool emit_accept_certificate (GLib.TlsCertificate peer_cert, GLib.TlsCertificateFlags 
errors);
-               public unowned GLib.TlsCertificate get_certificate ();
-               public unowned GLib.TlsDatabase get_database ();
-               public unowned GLib.TlsInteraction get_interaction ();
+               public unowned GLib.TlsCertificate? get_certificate ();
+               public unowned GLib.TlsDatabase? get_database ();
+               public unowned GLib.TlsInteraction? get_interaction ();
                [Version (since = "2.60")]
                public abstract unowned string? get_negotiated_protocol ();
-               public unowned GLib.TlsCertificate get_peer_certificate ();
+               public unowned GLib.TlsCertificate? get_peer_certificate ();
                public GLib.TlsCertificateFlags get_peer_certificate_errors ();
                [Version (deprecated = true, deprecated_since = "2.64.", since = "2.48")]
                public GLib.TlsRehandshakeMode get_rehandshake_mode ();
@@ -3501,7 +3501,7 @@ namespace GLib {
                [Version (since = "2.60")]
                public abstract void set_advertised_protocols ([CCode (array_length = false, 
array_null_terminated = true)] string[]? protocols);
                public void set_certificate (GLib.TlsCertificate certificate);
-               public void set_database (GLib.TlsDatabase database);
+               public void set_database (GLib.TlsDatabase? database);
                public void set_interaction (GLib.TlsInteraction? interaction);
                [Version (deprecated = true, deprecated_since = "2.60.", since = "2.48")]
                public void set_rehandshake_mode (GLib.TlsRehandshakeMode mode);
@@ -4844,7 +4844,7 @@ namespace GLib {
        public delegate GLib.Type DBusProxyTypeFunc (GLib.DBusObjectManagerClient manager, string 
object_path, string? interface_name);
        [CCode (cheader_filename = "gio/gio.h", instance_pos = 6.9)]
        [Version (since = "2.26")]
-       public delegate void DBusSignalCallback (GLib.DBusConnection connection, string sender_name, string 
object_path, string interface_name, string signal_name, GLib.Variant parameters);
+       public delegate void DBusSignalCallback (GLib.DBusConnection connection, string? sender_name, string 
object_path, string interface_name, string signal_name, GLib.Variant parameters);
        [CCode (cheader_filename = "gio/gio.h", instance_pos = 6.9)]
        [Version (since = "2.26")]
        public delegate unowned GLib.DBusInterfaceVTable? DBusSubtreeDispatchFunc (GLib.DBusConnection 
connection, string sender, string object_path, string interface_name, string node, void* out_user_data);