[Gtk-sharp-list] Patch for gecko-sharp sample

[David Joyner]

This fixes the gecko-sharp-2.0-0.12 sample for win32 if you have used
the installer from
http://forge.novell.com/modules/xfcontent/downloads.php/monowin32/
which appears to set the environment variable GECKOSHILLA_BASEPATH.  Dave

MozWindow.cs
91a92
>         win.Resize(800, 600);
134a136,137
>
>         WebControl.CompPath = Environment.GetEnvironmentVariable("GECKOSHILLA_BASEPATH");