configure.in: Check for wchar.h, mbstowcs, and wcswidth.

configure.in: Check for wchar.h, mbstowcs, and wcswidth.

        * configure.in: Check for wchar.h, mbstowcs, and wcswidth.
        * configure, config.in: Regenerate.
        * intl.c (gcc_gettext_width): New function.
        * intl.h: Prototype it.
cp:
        * call.c (print_z_candidates): Use gcc_gettext_width, not
        strlen, to determine how much padding to use.

From-SVN: r65517