ytracer的visible没加上

[zhangxingjing]

void showTracer(bool show)
    {
        m_isShowTracer = show;
        if(m_xTracer)
            m_xTracer->setVisible(m_isShowTracer);

        //////////////
	if(m_yTracer)
            m_yTracer->setVisible(m_isShowTracer);
        /////////////

        foreach (XxwTracer *tracer, m_dataTracers)
        {
            if(tracer)
                tracer->setVisible(m_isShowTracer);
        }
        if(m_lineTracer)
            m_lineTracer->setVisible(m_isShowTracer);
    }