From Axel: use built-in vsnprintf on windows

git-svn-id: http://root.cern.ch/svn/root/trunk@15430 27541ba8-7e3a-0410-8455-c3a389f83636

base/inc/RConfig.h

-/* @(#)root/base:$Name:  $:$Id: RConfig.h,v 1.88 2006/05/31 15:24:46 rdm Exp $ */
+/* @(#)root/base:$Name:  $:$Id: RConfig.h,v 1.89 2006/05/31 15:52:04 rdm Exp $ */
 
 /*************************************************************************
  * Copyright (C) 1995-2002, Rene Brun and Fons Rademakers.               *
@@ -408,6 +408,7 @@
 #   define NEED_STRING
 #   define NEED_STRCASECMP
 #   define NEED_SNPRINTF
+#   define DONTNEED_VSNPRINTF
 #   define ANSICPP
 #   define R__VECNEWDELETE    /* supports overloading of new[] and delete[] */
 #   define R__PLACEMENTDELETE /* supports overloading placement delete */

clib/inc/snprintf.h

-/* @(#)root/clib:$Name:  $:$Id: snprintf.h,v 1.1 2000/12/10 10:54:53 rdm Exp $ */
+/* @(#)root/clib:$Name:  $:$Id: snprintf.h,v 1.2 2002/07/09 15:29:54 rdm Exp $ */
 /* Author: Fons Rademakers  10/12/2000 */
 
 /*
@@ -23,7 +23,9 @@
 extern "C" {
 #endif
 
+#ifndef DONTNEED_VSNPRINTF
 int vsnprintf(char *string, size_t length, const char *format, va_list args);
+#endif
 int snprintf(char *string, size_t length, const char *format, ...);
 
 #ifdef __cplusplus

clib/src/snprintf.c

-/* @(#)root/clib:$Name:  $:$Id: snprintf.c,v 1.7 2005/12/08 17:36:18 pcanal Exp $ */
+/* @(#)root/clib:$Name:  $:$Id: snprintf.c,v 1.8 2005/12/12 03:33:51 pcanal Exp $ */
 /* Author: Tomi Salo & Fons Rademakers */
 
 /*
@@ -66,6 +66,8 @@ typedef unsigned long long ULong64_t; /* Portable unsigned long integer 8 bytes
 #define ZERO_PADDING 0x400
 #define IS_LONG_LONG_INT 0x800
 
+#ifndef DONTNEED_VSNPRINTF
+
 /* Extract a formatting directive from str. Str must point to a '%'.
    Returns number of characters used or zero if extraction failed. */
 
@@ -333,7 +335,6 @@ static int snprintf_convert_float(char *buffer, size_t buf_size,
    return print_buf_len;
 }
 
-
 int vsnprintf(char *str, size_t size, const char *format, va_list ap)
 {
    int status, left = (int) size - 1;
@@ -576,7 +577,7 @@ int vsnprintf(char *str, size_t size, const char *format, va_list ap)
 
    return size - left - 1;
 }
-
+#endif
 
 int snprintf(char *str, size_t size, const char *format, ...)
 {