[baobab] Show a message if allocated size is not available

[Stefano Facchini <sfacchini src gnome org>]

commit 91b9475687fcacf3f98cca1b2430644238ca8112
Author: Stefano Facchini <stefano facchini gmail com>
Date:   Sat Aug 10 15:27:21 2013 +0200

    Show a message if allocated size is not available

 src/baobab-window.vala |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/baobab-window.vala b/src/baobab-window.vala
index 3162e74..813a988 100644
--- a/src/baobab-window.vala
+++ b/src/baobab-window.vala
@@ -596,6 +596,10 @@ namespace Baobab {
                 set_chart_model (active_location.scanner, show_allocated_size);
 
                 set_ui_state (result_page, false);
+
+                if (!show_allocated_size) {
+                    message (_("Could not detect occupied disk sizes."), _("Apparent sizes are shown 
instead."), Gtk.MessageType.INFO);
+                }
             });
 
             clear_message ();