Can't process Gtk::Builder::get_widget errors

[Саша Иваненко <kitovyj mail ru>]

Hi all

I use Gtk::Builder to load UIs from glade-generated xml on win32(Visual Studio 9.0). 
Problem is what if widget with a given name does not exist get_widget generates access violation system 
exception, without any chance for me to catch it. All I can do is to check widget existence using gtk+ 
native gtk_builder_get_object call before calling Builder::get_widget. As far as I understand the root of 
the problem is what get_widget_checked internal call returns 0, and dynamic_cast from 0 throws AV instead 
of casting to 0 ( or throwing bad_cast?). 

Is it Win32 specific problem? Ho do the get_widget is intended to behave in case of non-existent widget 
name? I would appreciate any suggestions.

Thank you,
Alexander Ivanenko.