make log_debug() only log anything at all when we are in debug mode

before, it would log with LOG_DEBUG to syslog when !debug

src/usr.sbin/ntpd/log.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: log.c,v 1.3 2004/06/17 19:15:27 henning Exp $ */
+/*	$OpenBSD: log.c,v 1.4 2004/07/08 01:19:27 henning Exp $ */
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -129,9 +129,11 @@ log_debug(const char *emsg, ...)
 {
 	va_list	 ap;
 
-	va_start(ap, emsg);
-	vlog(LOG_DEBUG, emsg, ap);
-	va_end(ap);
+	if (debug) {
+		va_start(ap, emsg);
+		vlog(LOG_DEBUG, emsg, ap);
+		va_end(ap);
+	}
 }
 
 void