[gnome-flashback] libdesktop-background: fix black background

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 766aede653a1ed9ccb5ebee4458c06914cb255c9
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Thu Sep 25 20:30:00 2014 +0300

    libdesktop-background: fix black background

 .../libdesktop-background/desktop-window.c         |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/gnome-flashback/libdesktop-background/desktop-window.c 
b/gnome-flashback/libdesktop-background/desktop-window.c
index 2490490..ee0cdd6 100644
--- a/gnome-flashback/libdesktop-background/desktop-window.c
+++ b/gnome-flashback/libdesktop-background/desktop-window.c
@@ -251,6 +251,16 @@ desktop_window_configure_event (GtkWidget         *widget,
 }
 
 static void
+desktop_window_style_updated (GtkWidget *widget)
+{
+       DesktopWindow *window = DESKTOP_WINDOW (widget);
+
+       GTK_WIDGET_CLASS (desktop_window_parent_class)->style_updated (widget);
+
+       g_signal_emit (window, signals [UPDATE_SIGNAL], 0);
+}
+
+static void
 desktop_window_class_init (DesktopWindowClass *class)
 {
        GObjectClass   *object_class;
@@ -265,6 +275,7 @@ desktop_window_class_init (DesktopWindowClass *class)
        widget_class->unrealize = desktop_window_unrelaize;
        widget_class->map = desktop_window_map;
        widget_class->configure_event = desktop_window_configure_event;
+       widget_class->style_updated = desktop_window_style_updated;
 
        signals [UPDATE_SIGNAL] =
                g_signal_new ("update",