Fix dataZoom rounding error. Fix #2757
Fix dataZoom rounding error. Fix #2757

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