[tracker] tracker-preferences: Use Box not HBox which is deprecated

[Martyn James Russell <mr src gnome org>]

commit ddf240d2afb1857b239ab4cf78ef1184a4f51c29
Author: Martyn Russell <martyn lanedo com>
Date:   Thu May 8 19:30:42 2014 +0100

    tracker-preferences: Use Box not HBox which is deprecated

 src/tracker-preferences/tracker-preferences.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/tracker-preferences/tracker-preferences.vala 
b/src/tracker-preferences/tracker-preferences.vala
index f547223..3f072cc 100644
--- a/src/tracker-preferences/tracker-preferences.vala
+++ b/src/tracker-preferences/tracker-preferences.vala
@@ -67,7 +67,7 @@ public class Tracker.Preferences {
        private ToggleButton togglebutton_pictures;
        private ToggleButton togglebutton_videos;
        private ToggleButton togglebutton_download;
-       private HBox hbox_duplicate_warning;
+       private Box hbox_duplicate_warning;
        private Button button_reindex;
        private Notebook notebook;
 
@@ -135,7 +135,7 @@ public class Tracker.Preferences {
                togglebutton_pictures = builder.get_object ("togglebutton_pictures") as ToggleButton;
                togglebutton_videos = builder.get_object ("togglebutton_videos") as ToggleButton;
                togglebutton_download = builder.get_object ("togglebutton_download") as ToggleButton;
-               hbox_duplicate_warning = builder.get_object ("hbox_duplicate_warning") as HBox;
+               hbox_duplicate_warning = builder.get_object ("hbox_duplicate_warning") as Box;
 
                button_reindex = builder.get_object ("button_reindex") as Button;