ctype_base.h (ctype_base): fix __to_type definition.

ctype_base.h (ctype_base): fix __to_type definition.

        * config/os/djgpp/ctype_base.h (ctype_base): fix __to_type
        definition. Replace enum with static const variables.

        * config/os/djgpp/ctype_inline.h (ctype<char>::is): remove
        throw specification, fix typos, use <static_cast>.
        (ctype<char>::scan_is): remove throw specification.
        (ctype<char>::scan_not): likewise.

        * config/os/djgpp/ctype_noninline.h (ctype<char>::ctype): fix typo.
        (ctype<char>::do_toupper(char)): use <static_cast>.
        (ctype<char>::do_toupper(char *, const char *)): likewise.
        (ctype<char>::do_tolower(char)): likewise.
        (ctype<char>::do_tolower(char *, const char *)): likewise.

From-SVN: r40243