[gnome-system-monitor] Fix process tree column order saving

[Robert Roth <robertroth src gnome org>]

commit 663b058379bf8a1107b5c2f1d94bf14eb5a78062
Author: Edward Sheldrake <ejsheldrake gmail com>
Date:   Sat Nov 30 09:38:31 2013 +0000

    Fix process tree column order saving
    
    https://bugzilla.gnome.org/show_bug.cgi?id=719589

 src/treeview.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/treeview.c b/src/treeview.c
index 5240dc9..491f9d4 100644
--- a/src/treeview.c
+++ b/src/treeview.c
@@ -73,7 +73,7 @@ gsm_tree_view_save_state (GsmTreeView *tree_view)
         }
 
         g_settings_set_value (priv->settings, "columns-order",
-                              g_variant_new ("ai", builder));
+                              g_variant_builder_end (&builder));
 
         g_list_free (columns);
     }