[vala/0.38] gtk+-3.0: Mark MessageDialog constructor parameter, message_format, as nullable

[Rico Tzschichholz <ricotz src gnome org>]

commit 1e8be5b15375b73888b74779d9d91ba2d3633ab4
Author: Alistair Thomas <astavale yahoo co uk>
Date:   Wed Dec 13 16:14:46 2017 +0000

    gtk+-3.0: Mark MessageDialog constructor parameter, message_format, as nullable
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791570

 vapi/gtk+-3.0.vapi                       |    2 +-
 vapi/packages/gtk+-3.0/gtk+-3.0.metadata |    1 +
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/vapi/gtk+-3.0.vapi b/vapi/gtk+-3.0.vapi
index aa468dd..88e9cfb 100644
--- a/vapi/gtk+-3.0.vapi
+++ b/vapi/gtk+-3.0.vapi
@@ -3474,7 +3474,7 @@ namespace Gtk {
        public class MessageDialog : Gtk.Dialog, Atk.Implementor, Gtk.Buildable {
                [CCode (has_construct_function = false, type = "GtkWidget*")]
                [PrintfFormat]
-               public MessageDialog (Gtk.Window? parent, Gtk.DialogFlags flags, Gtk.MessageType type, 
Gtk.ButtonsType buttons, string message_format, ...);
+               public MessageDialog (Gtk.Window? parent, Gtk.DialogFlags flags, Gtk.MessageType type, 
Gtk.ButtonsType buttons, string? message_format, ...);
                [PrintfFormat]
                public void format_secondary_markup (string message_format, ...);
                [PrintfFormat]
diff --git a/vapi/packages/gtk+-3.0/gtk+-3.0.metadata b/vapi/packages/gtk+-3.0/gtk+-3.0.metadata
index 7ac6358..b3c3881 100644
--- a/vapi/packages/gtk+-3.0/gtk+-3.0.metadata
+++ b/vapi/packages/gtk+-3.0/gtk+-3.0.metadata
@@ -850,6 +850,7 @@ gtk_menu_tool_button_new.label nullable="1"
 GtkMessageDialog:buttons accessor_method="0"
 gtk_message_dialog_new ellipsis="1" printf_format="1"
 gtk_message_dialog_new.parent nullable="1"
+gtk_message_dialog_new.message_format nullable="1"
 gtk_message_dialog_new_with_markup ellipsis="1" printf_format="1"
 gtk_message_dialog_new_with_markup.parent nullable="1"
 gtk_message_dialog_format_secondary_markup ellipsis="1" printf_format="1"