[libstdc++] Don't access fpos_t.__state on uClibc w/o wchar support

[Gabriel Dos Reis]

Christoph Hellwig <hch@infradead.org> writes:

| On Mon, Sep 22, 2003 at 07:47:36PM +0200, Bernardo Innocenti wrote:
| > 
| > Don't access __state member of fpos_t when building on uClibc with
| > wchar support disabled.
| 
| Shouldn't this be an autoconf test whether the target libc has wchar
| support?

yup.

-- Gaby