[gnome-games] application: Add quit()

[Adrien Plazas <aplazas src gnome org>]

commit 0c42d47387d8a99aad9735a7d6409836eed7a5e1
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun Mar 6 19:43:18 2016 +0100

    application: Add quit()
    
    Check if we can quit the game when trying to quit the application.
    
    Fixes #259

 src/ui/application.vala |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/src/ui/application.vala b/src/ui/application.vala
index 0a44adc..65ca8ee 100644
--- a/src/ui/application.vala
+++ b/src/ui/application.vala
@@ -22,7 +22,7 @@ private class Games.Application : Gtk.Application {
                }
        }
 
-       private Gtk.Window window;
+       private ApplicationWindow window;
 
        public Application () {
                Object (application_id: "org.gnome.Games",
@@ -158,6 +158,13 @@ private class Games.Application : Gtk.Application {
                dialog.present ();
        }
 
+       private void quit () {
+               if (window != null && !window.quit_game ())
+                       return;
+
+               base.quit ();
+       }
+
        private static Gtk.CssProvider load_css (string css) {
                var provider = new Gtk.CssProvider ();
                try {