$NetBSD$

gcc-4.7.3 flags as: variable set but not used [-Werror=unused-but-set-variable]

--- tools/xenstore/xenstored_core.c.orig	2009-08-06 21:56:38.000000000 +0900
+++ tools/xenstore/xenstored_core.c	2013-05-30 14:26:53.000000000 +0900
@@ -130,7 +130,7 @@ void trace(const char *fmt, ...)
 	va_list arglist;
 	char *str;
 	char sbuf[1024];
-	int ret, dummy;
+	int ret, __attribute__((__unused__)) dummy;
 
 	if (tracefd < 0)
 		return;