gtk/src/textiter.hg: Add an _IGNORE()
gtk/src/textiter.hg: Add an _IGNORE()

* gtk/src/textiter.hg: _IGNORE(gtk_text_iter_assign), which was added as a
result of gtk+ bug #645258.

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