close actually close after send close ack

Signed-off-by: Andy Green <andy.green@linaro.org>

lib/service.c

@@ -512,6 +512,8 @@ libwebsocket_service_fd(struct libwebsocket_context *context,
 		     wsi->state == WSI_STATE_RETURNED_CLOSE_ALREADY ||
 		     wsi->state == WSI_STATE_FLUSHING_STORED_SEND_BEFORE_CLOSE) &&
 			   lws_handle_POLLOUT_event(context, wsi, pollfd)) {
+			if (wsi->state == WSI_STATE_RETURNED_CLOSE_ALREADY)
+				wsi->state = WSI_STATE_FLUSHING_STORED_SEND_BEFORE_CLOSE;
 			lwsl_info("libwebsocket_service_fd: closing\n");
 			goto close_and_handled;
 		}