(MIN_LEADING_BYTE): Changed to 0x00.

(MIN_LEADING_BYTE): Changed to 0x00.
(CHARSET_ID_OFFSET): New macro.
(LEADING_BYTE_CONTROL_1): Changed to (CHARSET_ID_OFFSET - 1).
(LEADING_BYTE_UCS_BMP): Changed to (CHARSET_ID_OFFSET - 2).
(LEADING_BYTE_LATIN_VISCII): Changed to (CHARSET_ID_OFFSET - 3).
(LEADING_BYTE_HIRAGANA_JISX0208): Changed to (CHARSET_ID_OFFSET - 4).
(LEADING_BYTE_KATAKANA_JISX0208): Changed to (CHARSET_ID_OFFSET - 5).
(MIN_LEADING_BYTE_PRIVATE): Changed to `MIN_LEADING_BYTE'.
(MAX_LEADING_BYTE_PRIVATE): Changed to (CHARSET_ID_OFFSET - 6).
(CHARSET_ID_OFFSET_94): Changed to (CHARSET_ID_OFFSET - '0').
(CHARSET_ID_OFFSET_96): Changed to (CHARSET_ID_OFFSET_94 + 80).
(CHARSET_ID_OFFSET_94x94): Changed to (CHARSET_ID_OFFSET_96 + 80).