term->screen.delete_is_del = ! term->screen.delete_is_del;
if (xtermDeleteIsDEL()) term->screen.delete_is_del = False; else term->screen.delete_is_del = True;
static void do_delete_del (	Widget gw GCC_UNUSED,	XtPointer closure GCC_UNUSED,	XtPointer data GCC_UNUSED){    term->screen.delete_is_del = ! term->screen.delete_is_del;    update_delete_del();}