[gnome-boxes] properties: Don't show empty notebook pages

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit ae71b46b6f054cc7f9e49fc61526c832b93fccd2
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Thu Dec 11 12:59:42 2014 +0000

    properties: Don't show empty notebook pages

 src/properties.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/properties.vala b/src/properties.vala
index d37f6c0..16d701f 100644
--- a/src/properties.vala
+++ b/src/properties.vala
@@ -34,6 +34,9 @@ private class Boxes.Properties: Gtk.Notebook, Boxes.UI {
 
         for (var i = 0; i < PropertiesPage.LAST; i++) {
             var page = new PropertiesPageWidget (i, machine);
+            if (page.empty)
+                continue;
+
             var label = new Gtk.Label (page.name);
             insert_page (page, label, i);
             set_data<PropertiesPageWidget> (@"boxes-property-$i", page);