File mpfr_vasprintf.patch of Package mingw32-mpfr

applies to mpfr-2.4.2-rc1 and also to mpfr-2.4.1.  already in mpfr-2.4 branch
and should be in the official mpfr-2.4.2 release.

--- vasprintf.c	2009/09/08 08:49:33	6413
+++ vasprintf.c	2009/09/11 22:03:10	6415
@@ -56,7 +56,7 @@
 # include <inttypes.h> /* for intmax_t */
 #else
 # if HAVE_STDINT_H
-#  include <stdint.h>
+#  include <stdint.h> /* for WINT_MAX in particular */
 # endif
 #endif
 
@@ -387,8 +387,15 @@
    integer type : int, unsigned int, long or unsigned long (unfortunately,
    this is implementation dependant).
    We follow gmp which assumes in print/doprnt.c that wchar_t is converted
-   to int. */
+   to int (because wchar_t <= int).
+   For wint_t, we assume that the case WINT_MAX < INT_MAX yields an
+   integer promotion. */
 #ifdef HAVE_WCHAR_H
+#if defined(WINT_MAX) && WINT_MAX < INT_MAX
+typedef int    mpfr_va_wint;  /* integer promotion */
+#else
+typedef wint_t mpfr_va_wint;
+#endif
 #define CASE_LONG_ARG(specinfo, ap)                                     \
   case LONG_ARG:                                                        \
   if (((specinfo).spec == 'd') || ((specinfo).spec == 'i')              \
@@ -396,7 +403,7 @@
       || ((specinfo).spec == 'x') || ((specinfo).spec == 'X'))          \
     (void) va_arg ((ap), long);                                         \
   else if ((specinfo).spec == 'c')                                      \
-    (void) va_arg ((ap), wint_t);                                       \
+    (void) va_arg ((ap), mpfr_va_wint);                                 \
   else if ((specinfo).spec == 's')                                      \
     (void) va_arg ((ap), int); /* we assume integer promotion */        \
   break;