GtkVButtonBox alignment

[Nicolás Lichtmaier <nick technisys com ar>]

Hi, I have a GtkVButtonBox filled with buttons "from stock". How can I 
make them to be left-aligned? These buttons have different widths, and 
it looks very bad to have the icons not aligned.

I have:

[   X Close    ]
[ / Properties ]

I want:

[ X Close      ]
[ / Properties ]

Thanks.