Icon theme demo: Catch exceptions while loading icons
Icon theme demo: Catch exceptions while loading icons

* demos/gtk-demo/example_icontheme.cc: Catch exceptions from the call to
Gtk::IconInfo::load_icon(). It throws a Gdk::PixbufError if an icon file is
corrupt.

GNOME/gtkmm,johne53/MB3Gtkmm,johne53/MB3Gtkmm,GNOME/gtkmm,GNOME/gtkmm,johne53/MB3Gtkmm,GNOME/gtkmm