Use gunichar instead of gint when appropriate in the interfaces

Use gunichar instead of gint when appropriate in the interfaces

2000-06-21  Havoc Pennington  <hp@redhat.com>

* gtk/gtktextiter.h: Use gunichar instead of gint when appropriate
in the interfaces

* gtk/gtktexttypes.c: Remove UTF functions, use glib
stuff instead when possible.

* gtk/gtktexttypes.h: Delete some unused constants

* gtktextbtree.c, gtktextiter.c, gtktextsegment.c, gtktextview.c,
testtextbuffer.c: use glib instead of custom unicode routines