[GitHub] [incubator-echarts] windend opened issue #9024: 小程序日历坐标系用heatmap，最后一天渲染不全

[GitHub]

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### One-line summary [问题简述]
小程序日历坐标系用heatmap，最后一天渲染不全




### Version & Environment [版本及环境]
+ ECharts version [ECharts 版本]:
+ Browser version [浏览器类型和版本]:
+ OS Version [操作系统类型和版本]:





### Expected behaviour [期望结果]





### ECharts option [ECharts配置项]
<!-- Copy and paste your 'echarts option' here. -->
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```javascript
option = {
title: {
      top: 'top',
      left: 'center',
      text: '2018年' + month + '月每天订单数'
    },
    calendar: {
      top: 'middle',
      left: 40,
      right: 20,
      cellSize: [40],
      range: '2018-0' + month,
      orient: 'vertical',
      yearLabel: {
        show: false,
      },
      monthLabel: {
        nameMap: 'cn'
      },
      dayLabel: {
        nameMap: 'cn'
      }
    },
    tooltip: {

    },
    visualMap: {
      min: 0,
      max: 400,
      type: 'piecewise',
      orient: 'horizontal',
      left: 'center',
      bottom: 20,
      splitNumber: 4,
    },
    legend: {
      legend: {
        data: ['工作', '娱乐', '睡觉'],
        bottom: 20
      }
    },
    series: {
      type: 'heatmap',
      coordinateSystem: 'calendar',
      data: datas.ordernums.slice(6, 36),
      label: {
        show: true,
        formatter: function(params) {
          return echarts.format.formatTime('dd', params.value[0]);
        },
        textStyle: {
          color: '#000',
          fontSize: 14
        }
      }
    }
}

```




### Other comments [其他信息]
<!-- For example: Screenshot or Online demo -->
<!-- [例如，截图或线上实例 (JSFiddle/JSBin/Codepen)] -->

![image](https://user-images.githubusercontent.com/5136318/45156368-90998080-b210-11e8-8a15-795581a05fb6.png)


[ Full content available at: 
https://github.com/apache/incubator-echarts/issues/9024 ]
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