fixup warnings on vista/mingw.

git-svn-id: https://unbound.nlnetlabs.nl/svn/trunk@1494 be551aaa-1e26-0410-a405-d3ace91eadb9

doc/Changelog

@@ -1,5 +1,6 @@
 24 February 2009: Wouter
 	- isc moved their dlv key download location.
+	- fixup warning on vista/mingw.
 
 20 February 2009: Wouter
 	- Fixup contrib/update-itar.sh, the exit codes 1 and 0 were swapped.

util/log.c

@@ -151,10 +151,12 @@ log_vmsg(int pri, const char* type,
 	const char *format, va_list args)
 {
 	char message[MAXSYSLOGMSGLEN];
-	char tmbuf[32];
 	unsigned int* tid = (unsigned int*)ub_thread_key_get(logkey);
 	time_t now;
+#if defined(HAVE_STRFTIME) && defined(HAVE_LOCALTIME_R) 
+	char tmbuf[32];
 	struct tm tm;
+#endif
 	(void)pri;
 	vsnprintf(message, sizeof(message), format, args);
 #ifdef HAVE_SYSLOG_H