2.91.5.1: 2010-12-02 Murray Cumming Temporarily remove methods that use GTK+ function not in GTK+ 2.91.5. * gtk/src/combobox.hg: Some new functions were added after the GTK+ 2.91.5 release, so this allows gtkmm 2.91.5.1 to build with GTK+ 2.91.5.