Function            changelitebar - set internal litebar menu
                                           information

  Syntax              void changelitebar(struct litebar_header *lh,
                                         struct litebar_field *lf)

  Prototype in        menuhk.h

  Remarks             sets internal variables for a litebar menu
                      regarding the currently hilited item.

                      This function is used internally by several
                      litebar...() menu functions.

  Return value        nothing.

  Note                This function is for internal uses only.

  See also            menuhk.h
                      isHiliteable(), litebar_alloc(), litebar_free(),
                      litebar_get(), litehilite(), litemessage(),
                      liteunhilite(), menu_litebar()
                      litebarerrno