More robust Grid#getAxis
More robust Grid#getAxis

apache/incubator-echarts,hexj/echarts,chenfwind/echarts,benjaminbecktg/echarts,benjaminbecktg/echarts,willseeyou/echarts,100star/echarts,benjaminbecktg/echarts,xiayz/echarts,chenfwind/echarts,starlkj/echarts,willseeyou/echarts,willseeyou/echarts,starlkj/echarts,ecomfe/echarts,apache/incubator-echarts,ecomfe/echarts,xiayz/echarts,hexj/echarts,starlkj/echarts,100star/echarts,hexj/echarts