[gnome-control-center] background: Fix leak of the preview picture

[Bastien Nocera <hadess src gnome org>]

commit e7433f16297109c4369069cf2dbc8ca29fbaab1e
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Oct 2 13:36:19 2013 +0200

    background: Fix leak of the preview picture
    
    https://bugzilla.gnome.org/show_bug.cgi?id=709243

 panels/background/cc-background-panel.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/panels/background/cc-background-panel.c b/panels/background/cc-background-panel.c
index 1148b80..e194c8b 100644
--- a/panels/background/cc-background-panel.c
+++ b/panels/background/cc-background-panel.c
@@ -253,6 +253,7 @@ update_display_preview (CcBackgroundPanel *panel,
                                    pixbuf,
                                    0, 0);
       cairo_paint (cr);
+      g_object_unref (pixbuf);
     }
 
   cairo_destroy (cr);