[gnome-boxes] wizard-toolbar: Keep a ref to WizardWindow

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 4d579b5bae1d3d3c53f44abea7f527a383184418
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Sun Dec 7 21:47:27 2014 +0000

    wizard-toolbar: Keep a ref to WizardWindow
    
    WizardToolbar now keeps an unowned reference to its parent WizardWindow.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741046

 src/wizard-toolbar.vala |    6 ++++++
 src/wizard-window.vala  |    1 +
 2 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/src/wizard-toolbar.vala b/src/wizard-toolbar.vala
index cbc9ce7..3c9a67d 100644
--- a/src/wizard-toolbar.vala
+++ b/src/wizard-toolbar.vala
@@ -12,6 +12,12 @@ private class Boxes.WizardToolbar: HeaderBar {
     [GtkChild]
     public Button create_btn;
 
+    private unowned WizardWindow wizard_window;
+
+    public void setup_ui (WizardWindow wizard_window) {
+        this.wizard_window = wizard_window;
+    }
+
     public void click_back_button () {
         if (back_btn.sensitive)
             back_btn.clicked ();
diff --git a/src/wizard-window.vala b/src/wizard-window.vala
index b0c1611..ce4f808 100644
--- a/src/wizard-window.vala
+++ b/src/wizard-window.vala
@@ -47,6 +47,7 @@ private class Boxes.WizardWindow : Gtk.Window, Boxes.UI {
 
     public WizardWindow (AppWindow app_window) {
         wizard.setup_ui (app_window, this);
+        topbar.setup_ui (this);
 
         set_transient_for (app_window);