ax_wint_t

It turns out that MacOS X doesn't guarantee to provide the "wint_t" type unless you include the strange header <runetype.h> in addition to <wchar.h>. Consequently, the "do I have a system wint_t?" probe fails and an alternate gets used. Unfortunately, by the time the program gets built, one way or another that funny header winds up getting included and the "#define wint_t unsigned int" patch-up-hack mutilates the typedef. This macro will get it right.

AC_DEFUN([AX_WINT_T],[
 AC_CHECK_HEADERS([runetype.h wchar.h])
 AC_CHECK_TYPE(wint_t, [], [
   AC_DEFINE_UNQUOTED([wint_t], [unsigned int],
       [Define to `unsigned int' if not found])], [
   AC_INCLUDES_DEFAULT
   #if HAVE_RUNETYPE_H
   # include <runetype.h>
   #endif
   #if HAVE_WCHAR_H
   # include <wchar.h>
   #endif
   ])])

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