* modules/fnmatch (Depends-on): Depend on wchar.

* modules/fnmatch (Depends-on): Depend on wchar.
* lib/fnmatch.c (WIDE_CHAR_SUPPORT): Assume <wchar.h>.
* m4/fnmatch.m4: Likewise.
* modules/mbchar (Makefile.am): Assume <wchar.h>.
* m4/mbchar.m4: Likewise.
* modules/mbswidth (Depends-on): Depend on wchar.
* lib/mbswidth.c: Assume <wchar.h>.
* m4/mbswidth.m4: Likewise.
* modules/quotearg (Depends-on): Depend on wchar.
* lib/quotearg.c: Assume <wchar.h>.
* m4/quotearg.m4: Likewise.
* modules/regex (Depends-on): Depend on wchar.
* lib/regex_internal.h: Assume <wchar.h>.
* m4/regex.m4: Likewise.
* modules/stdint (Depends-on): Depend on wchar.
* lib/stdint_.h [!defined WCHAR_MIN]: Assume <wchar.h>.
* m4/stdint.m4: Likewise.
* tests/test-stdint.c [HAVE_WINT_T]: Likewise.
* modules/strftime (Depends-on): Depend on wchar.
* lib/strftime.c (DO_MULTIBYTE): Assume <wchar.h>.
* modules/strtol (Depends-on): Depend on wchar.
* lib/strtol.c: Assume <wchar.h>.
* modules/wcwidth (Depends-on): Depend on wchar.
* lib/wcwidth.h: Assume <wchar.h>.
* m4/wcwidth.m4: Likewise.