fixing missing save_state/restore_state in scatterplot's render() method
fixing missing save_state/restore_state in scatterplot's render() method

tommy-u/chaco,ContinuumIO/chaco,tommy-u/chaco,burnpanck/chaco,tommy-u/chaco,ContinuumIO/chaco,ContinuumIO/chaco,burnpanck/chaco,burnpanck/chaco,ContinuumIO/chaco