[gthumb] use the dark theme

[Paolo Bacchilega <paobac src gnome org>]

commit 8cb4b420db234dc47b4834dd9965558062f5d9b8
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Thu Nov 7 15:58:05 2013 +0100

    use the dark theme

 gthumb/main.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gthumb/main.c b/gthumb/main.c
index 287c809..93f778e 100644
--- a/gthumb/main.c
+++ b/gthumb/main.c
@@ -359,6 +359,8 @@ gth_application_startup (GApplication *application)
 {
        G_APPLICATION_CLASS (gth_application_parent_class)->startup (application);
 
+        g_object_set (gtk_settings_get_default (), "gtk-application-prefer-dark-theme", TRUE, NULL);
+
        _gth_application_initialize_app_menu (application);
        gth_pref_initialize ();
        migrate_data ();