add: ev.xexpose.serial = 0;
context: W_RedisplayView(W_View *view){    XEvent ev;        if (!view->flags.mapped)	return;        ev.xexpose.type = Expose;    ev.xexpose.display = view->screen->display;    ev.xexpose.window = view->window;    ev.xexpose.count = 0;    WMHandleEvent(&ev);}