[4.0] 9b9498c Silence unused argument warning

[Martin Blix Grydeland]

commit 9b9498cc4bc933f43ab7aed3d0a7ff71bf622f07
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date:   Tue Feb 25 11:50:44 2014 +0100

    Silence unused argument warning

diff --git a/bin/varnishhist/varnishhist.c b/bin/varnishhist/varnishhist.c
index 87558e1..3cf128e 100644
--- a/bin/varnishhist/varnishhist.c
+++ b/bin/varnishhist/varnishhist.c
@@ -194,7 +194,10 @@ accumulate(struct VSL_data *vsl, struct VSL_transaction * const pt[],
 	unsigned tag, hit;
 	double value;
 	struct VSL_transaction *tr;
+
+	(void)vsl;
 	(void)priv;
+
 	for (tr = pt[0]; tr != NULL; tr = *++pt) {
 		value = -1;
 		hit = 0;