if (char_id >= 0)
decoding_table_put_char (ccs, code_point, make_char (char_id));
else
decoding_table_put_char (ccs, code_point, Qnil);
if (char_id >= 0)
decoding_table_put_char (ccs, code_point, make_char (char_id));
else
decoding_table_put_char (ccs, code_point, Qnil);