[GitHub] [incubator-echarts] git-stf-01 opened issue #9121: K线图表为什么会这样？？？！！！K线的阴阳烛空心问题。。

[GitHub]

### K线的阴阳烛空心问题。。 [问题简述]

### Version & Environment [版本及环境]
+ echarts-4.2.0-rc.1.js


### Expected behaviour [期望结果]
希望能空心显示。。。

### ECharts option [ECharts配置项]
```javascript
option = {
            xAxis: {
                data: ['2017-10-24', '2017-10-25', '2017-10-26', '2017-10-27']
            },
            yAxis: {
                scale: true
            },
            series: [{
                type: 'k',
                data: [
                    ['97.05', '98.95', '99.00', '97.05'],
                    ['99.50', '98.50', '99.50', '98.15'],
                    ['97.50', '97.30', '98.50', '96.85'],
                    ['96.55', '97.25', '97.30', '95.75']
                ],
                // data: [
                //     [20, 30, 10, 35],
                //     [40, 35, 30, 55],
                //     [33, 38, 33, 40],
                //     [40, 40, 32, 42]
                // ],
                itemStyle: {
                    color: 'transparent',
                    color0: 'green',
                    borderColor: 'red',
                    borderColor0: 'green'
                }
            }]
        };

### Other comments [其他信息]
两组数据效果完全不同。。
97.05--那一组数据非空心。。。中间多了一根线；
20--那一组数据为空心。。。显示正常



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https://github.com/apache/incubator-echarts/issues/9121 ]
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