remember to close pipes

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@967 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_pool.c

@@ -194,6 +194,8 @@ wrk_thread(void *priv)
 	VSL_stats->n_wrk--;
 	UNLOCK(&wrk_mtx);
 	VSL(SLT_WorkThread, 0, "%p end", w);
+	close(w->pipe[0]);
+	close(w->pipe[1]);
 	return (NULL);
 }