Properly zero the worker structure when we start a thread.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@496 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_pool.c

@@ -34,7 +34,7 @@ wrk_thread(void *priv)
 	struct timespec ts;
 
 	w = &ww;
-	memset(w, 0, sizeof w);
+	memset(w, 0, sizeof *w);
 
 	AZ(pthread_cond_init(&w->cv, NULL));