(redraw_cursor): Fix checking of redrawing area. (set_input_method_spot): Don't check face if the buffer is empty. (show_cursor): Likewise. (delete_char): Fix adjustment of nchars.
(redraw_cursor): Fix checking of redrawing area.
(set_input_method_spot): Don't check face if the buffer is empty.
(show_cursor): Likewise.
(delete_char): Fix adjustment of nchars.

xmirror/m17n-lib,xmirror/m17n-lib,xmirror/m17n-lib,xmirror/m17n-lib