[procedure] ucs2->integer ucs2

[procedure] integer->ucs2 integer

Bigloo: UCS2 counterparts of char->integer and integer->char. See ucs2?.

Note: Gauche has char->ucs and ucs->char, which corresponds to Bigloo's ucs2->integer and integer->ucs2. (Bigloo uses ucs2 as UCS2 character, while Gauche uses ucs as UCS2 codepoint, hence these confusing names. In Gauche there's no distinction between ascii characters and wide (multibyte) characters.).