[gnome-control-center] display: Fix double free of GError

[Robert Ancell <rancell src gnome org>]

commit 4aee26cc77be65d76c4bc118077b80418220608c
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue May 29 15:01:03 2018 +1200

    display: Fix double free of GError

 panels/display/cc-night-light-dialog.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/panels/display/cc-night-light-dialog.c b/panels/display/cc-night-light-dialog.c
index 55fca2429..34270cada 100644
--- a/panels/display/cc-night-light-dialog.c
+++ b/panels/display/cc-night-light-dialog.c
@@ -587,7 +587,6 @@ cc_night_light_dialog_init (CcNightLightDialog *self)
   if (error != NULL)
     {
       g_critical ("Could not load interface file: %s", error->message);
-      g_error_free (error);
       return;
     }