[master] aa44091 Quench a warning about empty format args.

[Poul-Henning Kamp]

commit aa44091e6a3cf34911f1ef2a038e00601296c970
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Tue Jan 7 14:51:55 2014 +0000

    Quench a warning about empty format args.

diff --git a/bin/varnishd/cache/cache_req_fsm.c b/bin/varnishd/cache/cache_req_fsm.c
index 92aeb19..c9defc8 100644
--- a/bin/varnishd/cache/cache_req_fsm.c
+++ b/bin/varnishd/cache/cache_req_fsm.c
@@ -643,7 +643,7 @@ cnt_restart(struct worker *wrk, struct req *req)
 		wid = VXID_Get(&wrk->vxid_pool);
 		// XXX: ReqEnd + ReqAcct ?
 		VSLb(req->vsl, SLT_Link, "req %u restart", wid);
-		VSLb(req->vsl, SLT_End, "");
+		VSLb(req->vsl, SLT_End, "%s", "");
 		VSL_Flush(req->vsl, 0);
 		owid = req->vsl->wid & VSL_IDENTMASK;
 		req->vsl->wid = wid | VSL_CLIENTMARKER;