[vala] gtk+ 3: headerbar subtitle can be null

[Ignacio Casal Quinteiro <icq src gnome org>]

commit a65166f051719c3487be2eabd38a9273deced0ee
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Tue May 28 14:50:26 2013 +0200

    gtk+ 3: headerbar subtitle can be null

 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 6cd039c..2954d97 100644
--- a/vapi/gtk+-3.0.vapi
+++ b/vapi/gtk+-3.0.vapi
@@ -2278,7 +2278,7 @@ namespace Gtk {
                public void pack_end (Gtk.Widget child);
                public void pack_start (Gtk.Widget child);
                public void set_custom_title (Gtk.Widget title_widget);
-               public void set_subtitle (string subtitle);
+               public void set_subtitle (string? subtitle);
                public void set_title (string title);
                public Gtk.Widget custom_title { get; set construct; }
                [NoAccessorMethod]
diff --git a/vapi/packages/gtk+-3.0/gtk+-3.0.metadata b/vapi/packages/gtk+-3.0/gtk+-3.0.metadata
index 2965568..bfc350c 100644
--- a/vapi/packages/gtk+-3.0/gtk+-3.0.metadata
+++ b/vapi/packages/gtk+-3.0/gtk+-3.0.metadata
@@ -315,6 +315,7 @@ gtk_grid_attach_next_to.sibling nullable="1"
 GtkHandleBox.child_detached hidden="1"
 GtkHandleBox::child_detached hidden="1"
 gtk_hscale_new.adjustment nullable="1"
+gtk_header_bar_set_subtitle.subtitle nullable="1"
 GtkInfoBar::response has_emitter="1"
 gtk_get_current_event transfer_ownership="1"
 gtk_get_current_event_state.state is_out="1"