[baobab] Do not use deprecated API

[Stefano Facchini <sfacchini src gnome org>]

commit 1cbccf1e6f3f66a2d6b040377b084340c8f06292
Author: Stefano Facchini <stefano facchini gmail com>
Date:   Mon Jul 1 21:20:04 2013 +0200

    Do not use deprecated API

 src/baobab-window.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/baobab-window.vala b/src/baobab-window.vala
index 360f7d0..a26b4d4 100644
--- a/src/baobab-window.vala
+++ b/src/baobab-window.vala
@@ -224,8 +224,8 @@ namespace Baobab {
         void on_scan_folder_activate () {
             var file_chooser = new Gtk.FileChooserDialog (_("Select Folder"), this,
                                                           Gtk.FileChooserAction.SELECT_FOLDER,
-                                                          Gtk.Stock.CANCEL, Gtk.ResponseType.CANCEL,
-                                                          Gtk.Stock.OPEN, Gtk.ResponseType.ACCEPT);
+                                                          _("_Cancel"), Gtk.ResponseType.CANCEL,
+                                                          _("_Open"), Gtk.ResponseType.ACCEPT);
 
             file_chooser.set_modal (true);