柱状图值为负数时， scale:true有问题echarts 柱状配置项内容和展示

柱状图值为负数且坐标不从0开始会出现该问题，柱子应该往下才对，echart2.0没问题

      option = {
    title : {
        text: '某地区蒸发量和降水量',
        subtext: '纯属虚构'
    },
    tooltip : {
        trigger: 'axis'
    },
    legend: {
        data:['蒸发量','降水量']
    },
    toolbox: {
        show : true,
        feature : {
            mark : {show: true},
            dataView : {show: true, readOnly: false},
            magicType : {show: true, type: ['line', 'bar']},
            restore : {show: true},
            saveAsImage : {show: true}
        }
    },
  
    xAxis : [
        {
            type : 'category',
            data : ['1月','2月','3月','4月','5月','6月','7月','8月','9月','10月','11月','12月']
        }
    ],
    yAxis : [
        {
            type : 'value',
                          scale:true

        }
    ],
    series : [
        {
            name:'蒸发量',
            type:'bar',
            data:[
  {
    "cityId": 791,
    "value": "-",
    "centerId": 79112487,
    "countyId": 9102
  },
  
  {
    "cityId": 791,
    "value": "-",
    "centerId": 79112490,
    "countyId": 9102
  },
  
  {
    "cityId": 791,
    "value": -100,
    "centerId": 79105878,
    "countyId": 9102
  },
  {
    "cityId": 791,
    "value": -156.73,
    "centerId": 79107195,
    "countyId": 9102
  },
  {
    "cityId": 791,
    "value": -158.26,
    "centerId": 79105874,
    "countyId": 9102
  },
  {
    "cityId": 791,
    "value": -160,
    "centerId": 79107194,
    "countyId": 9102
  },
  {
    "cityId": 791,
    "value": -161.28,
    "centerId": 79106490,
    "countyId": 9102
  },
  {
    "cityId": 791,
    "value": -165.26,
    "centerId": 79105877,
    "countyId": 9102
  },
  {
    "cityId": 791,
    "value": -66,
    "centerId": 79105883,
    "countyId": 9102
  },
  {
    "cityId": 791,
    "value": -68.46,
    "centerId": 79105882,
    "countyId": 9102
  }
]
        }
    ]
};