get_maximized

["Roderich Schupp" <roderich schupp googlemail com>]

> > If the answer to both questions is YES, how will it work ?
>
> Sheer magic, or more probably an error due to my badly deteriorating
> memory.  I'll let you decide and, in case, test.

Overload magic on the object returned from $event->changed_mask as explained in
http://gtk2-perl.sourceforge.net/doc/pod/Gtk2/api.html#Flags_and_Enums
and http://gtk2-perl.sourceforge.net/doc/pod/Gtk2/Gdk/Event/WindowState.html

Cheers, Roderich