Forgot to amend previous commit

There was a missing bracket that I fixed but forgot to amend the
commit. Fixing with this one.

bin/varnishd/cache/cache_req_fsm.c

@@ -154,7 +154,7 @@ cnt_deliver(struct worker *wrk, struct req *req)
 	 * age. Truncate to zero in that case).
 	 */
 	http_PrintfHeader(req->resp, "Age: %.0f",
-	    floor(fmax(0., req->t_prev - req->objcore->exp.t_origin));
+	    floor(fmax(0., req->t_prev - req->objcore->exp.t_origin)));
 
 	http_SetHeader(req->resp, "Via: 1.1 varnish-v4");