[vala] gtk+-3.0: Gtk.Scrollbar constructor allows null adjustment

[Evan Nemerson <evann src gnome org>]

commit e8885750854db7c66f62d85a38ff5cd6327c41a4
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Jun 7 18:07:06 2012 -0700

    gtk+-3.0: Gtk.Scrollbar constructor allows null adjustment
    
    Fixes bug 669516.

 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 3be6e00..8dde0ee 100644
--- a/vapi/gtk+-3.0.vapi
+++ b/vapi/gtk+-3.0.vapi
@@ -3562,7 +3562,7 @@ namespace Gtk {
 	[CCode (cheader_filename = "gtk/gtk.h")]
 	public class Scrollbar : Gtk.Range, Atk.Implementor, Gtk.Buildable, Gtk.Orientable {
 		[CCode (has_construct_function = false, type = "GtkWidget*")]
-		public Scrollbar (Gtk.Orientation orientation, Gtk.Adjustment adjustment);
+		public Scrollbar (Gtk.Orientation orientation, Gtk.Adjustment? adjustment);
 	}
 	[CCode (cheader_filename = "gtk/gtk.h")]
 	public class ScrolledWindow : Gtk.Bin, Atk.Implementor, Gtk.Buildable {
diff --git a/vapi/packages/gtk+-3.0/gtk+-3.0.metadata b/vapi/packages/gtk+-3.0/gtk+-3.0.metadata
index 77f187e..13ead85 100644
--- a/vapi/packages/gtk+-3.0/gtk+-3.0.metadata
+++ b/vapi/packages/gtk+-3.0/gtk+-3.0.metadata
@@ -582,6 +582,7 @@ gtk_scale_get_layout_offsets.x is_out="1"
 gtk_scale_get_layout_offsets.y is_out="1"
 GtkScale::format_value transfer_ownership="1"
 GtkScrollable type_cname="GtkScrollableInterface"
+gtk_scrollbar_new.adjustment nullable="1"
 gtk_scrolled_window_new.hadjustment nullable="1"
 gtk_scrolled_window_new.vadjustment nullable="1"
 gtk_selection_add_targets.targets is_array="1"