wcwidth.h requires wint_t type

[Bruno Haible]

Hi,

On MacOS X 10.2 (Darwin 6.x), wcwidth.h gives a compilation error, because
wint_t is not defined. All other uses of wint_t in gnulib are protected by
HAVE_WCHAR_H or HAVE_WINT_T, only this one is missing the check. I'm applying
this:

2006-10-24  Bruno Haible  <address@hidden>

        * modules/wcwidth (Files): Add m4/wint_t.m4.
        * m4/wcwidth.m4 (gl_FUNC_WCWIDTH): Require gt_TYPE_WINT_T.
        * lib/wcwidth.h (iswprint): Use 'int' if 'wint_t' is not defined.

diff -c -3 -r1.3 wcwidth
*** modules/wcwidth     29 Jun 2006 11:50:52 -0000      1.3
--- modules/wcwidth     24 Oct 2006 20:16:24 -0000
***************
*** 5,10 ****
--- 5,11 ----
  lib/wcwidth.h
  m4/wcwidth.m4
  m4/wchar_t.m4
+ m4/wint_t.m4
  
  Depends-on:
  
diff -c -3 -r1.5 wcwidth.m4
*** m4/wcwidth.m4       11 Aug 2006 13:09:44 -0000      1.5
--- m4/wcwidth.m4       24 Oct 2006 20:16:24 -0000
***************
*** 1,4 ****
! # wcwidth.m4 serial 5
  dnl Copyright (C) 2006 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # wcwidth.m4 serial 6
  dnl Copyright (C) 2006 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
***************
*** 11,16 ****
--- 11,17 ----
  
    AC_REQUIRE([AC_C_INLINE])
    AC_REQUIRE([gt_TYPE_WCHAR_T])
+   AC_REQUIRE([gt_TYPE_WINT_T])
  
    AC_CHECK_HEADERS_ONCE([wchar.h wctype.h])
    AC_CHECK_FUNCS_ONCE([iswprint wcwidth])
diff -c -3 -r1.5 wcwidth.h
*** lib/wcwidth.h       28 Jul 2006 17:32:33 -0000      1.5
--- lib/wcwidth.h       24 Oct 2006 20:16:24 -0000
***************
*** 37,43 ****
--- 37,47 ----
  # endif
  # if !defined iswprint && !HAVE_ISWPRINT
  static inline int
+ #  if HAVE_WINT_T
  iswprint (wint_t wc)
+ #  else
+ iswprint (int wc)
+ #  endif
  {
    return (wc >= 0 && wc < 128
          ? wc >= ' ' && wc <= '~'