[GtkGLExt] GL widget destrcution problems

["Jordi Rovira" <caminant gmail com>]

Hi,

  In the same context that my previous message (on resize), i have
another problem regarding widget destruction: Whenever i "delete" the
GLWidget described in my last message i get an error inside sigc, which
seems to come from the Gtk::GL::DrawingArea destructor (but i'm not
sure). 

  To find a minimal case giving problems i've been reducing the code until this:
    
    Gtk::GL::DrawingArea* temp = new Gtk::GL::DrawingArea();
    delete temp;

  which causes the following error message and crash:

glibmm-ERROR **: file objectbase.cc: line 77 (void
Glib::ObjectBase::initialize(GObject*)): assertion failed: (gobject_ ==
castitem)

  this message is different from the crash i get when deleting my
widget (derived from Gtk::GL::DrawingArea), but maybe it is related.

  Any help will be welcome

j.