Assert fcntl(2) have not failed.

git-svn-id: http://www.varnish-cache.org/svn/trunk@3488 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_acceptor_kqueue.c

@@ -209,8 +209,10 @@ vca_kqueue_init(void)
 	int i;
 
 	i = fcntl(vca_pipes[0], F_GETFL);
+	assert(i != -1);
 	i |= O_NONBLOCK;
 	i = fcntl(vca_pipes[0], F_SETFL, i);
+	assert(i != -1);
 
 	AZ(pthread_create(&vca_kqueue_thread, NULL, vca_kqueue_main, NULL));
 }