[hyena] [Hyena.Gui] Fix NRE in FormatEscaped method

[Gabriel Burt <gburt src gnome org>]

commit a71efd4a32e9c8ebb3c1182f81544461bc5c4656
Author: Gabriel Burt <gabriel burt gmail com>
Date:   Thu Oct 14 13:36:27 2010 -0500

    [Hyena.Gui] Fix NRE in FormatEscaped method

 Hyena.Gui/Hyena.Gui/PangoExtensions.cs |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Hyena.Gui/Hyena.Gui/PangoExtensions.cs b/Hyena.Gui/Hyena.Gui/PangoExtensions.cs
index 9a7bcc1..2b2b7a7 100644
--- a/Hyena.Gui/Hyena.Gui/PangoExtensions.cs
+++ b/Hyena.Gui/Hyena.Gui/PangoExtensions.cs
@@ -48,7 +48,7 @@ namespace Hyena.Gui
 
         public static string FormatEscaped (this string format, params object [] args)
         {
-            return String.Format (format, args.Select (a => GLib.Markup.EscapeText (a.ToString ())).ToArray ());
+            return String.Format (format, args.Select (a => a == null ? "" : GLib.Markup.EscapeText (a.ToString ())).ToArray ());
         }
     }
 }