avoid vasnprintf warnings

[Bruno Haible]

On Solaris 8, I'm seeing these warnings:

"./vasnprintf.c", line 2385: warning: argument #3 is incompatible with 
prototype:
"./vasnprintf.c", line 2430: warning: argument #3 is incompatible with 
prototype:
"./vasnprintf.c", line 2479: warning: argument #3 is incompatible with 
prototype:
"./vasnprintf.c", line 2561: warning: argument #3 is incompatible with 
prototype:
"./vasnprintf.c", line 2590: warning: argument #3 is incompatible with 
prototype:

The reason is that the system's wcrtomb function is being called with a
parameter that points to an 'rpl_mbstate_t' (rather than an 'mbstate_t').
This could be dangerous, because sizeof (rpl_mbstate_t) < sizeof (mbstate_t).
This fixes it:


2010-01-01  Bruno Haible  <address@hidden>

        vasnprintf: Avoid passing an 'rpl_mbstate_t *' to the system's wcrtomb.
        * lib/vasnprintf.c (VASNPRINTF): If GNULIB_defined_mbstate_t is
        defined, use wctomb instead of wcrtomb.

--- lib/vasnprintf.c.orig       Fri Jan  1 02:54:06 2010
+++ lib/vasnprintf.c    Fri Jan  1 02:51:15 2010
@@ -1,5 +1,5 @@
 /* vsprintf with automatic memory allocation.
-   Copyright (C) 1999, 2002-2009 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2002-2010 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -2367,7 +2367,7 @@
                     {
                       /* Use only as many wide characters as needed to produce
                          at most PRECISION bytes, from the left.  */
-#  if HAVE_WCRTOMB
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                       mbstate_t state;
                       memset (&state, '\0', sizeof (mbstate_t));
 #  endif
@@ -2381,7 +2381,7 @@
                           if (*arg_end == 0)
                             /* Found the terminating null wide character.  */
                             break;
-#  if HAVE_WCRTOMB
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                           count = wcrtomb (cbuf, *arg_end, &state);
 #  else
                           count = wctomb (cbuf, *arg_end);
@@ -2412,7 +2412,7 @@
                     {
                       /* Use the entire string, and count the number of
                          bytes.  */
-#  if HAVE_WCRTOMB
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                       mbstate_t state;
                       memset (&state, '\0', sizeof (mbstate_t));
 #  endif
@@ -2426,7 +2426,7 @@
                           if (*arg_end == 0)
                             /* Found the terminating null wide character.  */
                             break;
-#  if HAVE_WCRTOMB
+#  if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                           count = wcrtomb (cbuf, *arg_end, &state);
 #  else
                           count = wctomb (cbuf, *arg_end);
@@ -2464,7 +2464,7 @@
                   {
                     TCHAR_T *tmpptr = tmpsrc;
                     size_t remaining;
-#   if HAVE_WCRTOMB
+#   if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                     mbstate_t state;
                     memset (&state, '\0', sizeof (mbstate_t));
 #   endif
@@ -2475,7 +2475,7 @@
 
                         if (*arg == 0)
                           abort ();
-#   if HAVE_WCRTOMB
+#   if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                         count = wcrtomb (cbuf, *arg, &state);
 #   else
                         count = wctomb (cbuf, *arg);
@@ -2545,7 +2545,7 @@
                     {
                       /* We know the number of bytes in advance.  */
                       size_t remaining;
-#   if HAVE_WCRTOMB
+#   if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                       mbstate_t state;
                       memset (&state, '\0', sizeof (mbstate_t));
 #   endif
@@ -2557,7 +2557,7 @@
 
                           if (*arg == 0)
                             abort ();
-#   if HAVE_WCRTOMB
+#   if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                           count = wcrtomb (cbuf, *arg, &state);
 #   else
                           count = wctomb (cbuf, *arg);
@@ -2575,7 +2575,7 @@
                     }
                   else
                     {
-#   if HAVE_WCRTOMB
+#   if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                       mbstate_t state;
                       memset (&state, '\0', sizeof (mbstate_t));
 #   endif
@@ -2586,7 +2586,7 @@
 
                           if (*arg == 0)
                             abort ();
-#   if HAVE_WCRTOMB
+#   if HAVE_WCRTOMB && !defined GNULIB_defined_mbstate_t
                           count = wcrtomb (cbuf, *arg, &state);
 #   else
                           count = wctomb (cbuf, *arg);