-#ifdef WIN32
- _vsnprintf(buf, sizeof(buf)-1, fmt, ap);
-#else
-/* !WIN32 */
-#if HAVE_VSNPRINTF
- vsnprintf(buf, sizeof(buf), fmt, ap);
-#else
- vsprintf(buf, fmt, ap);
-#endif
-#endif
-/* WIN32 */
+ va_start(ap, fmt);
+ yaz_vsnprintf(buf, sizeof(buf)-1, fmt, ap);