barMinHeight 和 inverse 一起使用，数值为0 时 ，inverse 属性失效echarts 柱状配置项内容和展示

当 inverse (是否是反向坐标轴) 和 barMinHeight (柱状图最小高度) 一起使用，数据为 0 时 ，柱状图出现反方向显示，inverse属性失效。

      var ydata = [
    '虚拟机1',
    '虚拟机2',
    '虚拟机3',
    '虚拟机4',
    '虚拟机5',
    '虚拟机6',
    '虚拟机7',
    '虚拟机8',
    '虚拟机9'
];

var barData1 = {
    all: [1234,2345,3456,4567,5678,6789,7890,8901,12345],
    used: [234,1345,2456,3567,3678,0,5890,3901,10234]
};
var barData2 = {
    all: [1234,2345,3456,4567,5678,6789,7890,8901,12345],
    used: [234,1345,1456,1567,1678,0,3890,6901,12034]
};
option = {
    title: {
        text: '虚拟机资源使用情况',
        x: 'center',
        y: 0
    },
    tooltip: {},
    legend: {
        top:50,
        right: 30,
        data: ['分配', '已使用']
    },
    grid: [{
            x: '5%',
            y: '15%',
            width: '38%',
            height: '60%',
        },
        {
            x: '60%',
            y: '15%',
            width: '35%',
            height: '60%',
        },
    ],
    xAxis: [{
            gridIndex: 0,
            type: 'value',
            inverse: 'true',
            axisLabel: {
                show: false,
            },
            axisTick: {
                show: false,
            },
            splitLine: {
                show: false,
            }
        },
        {
            gridIndex: 1,
            type: 'value',
            axisLabel: {
                show: false,
            },
            axisTick: {
                show: false,
            },
            splitLine: {
                show: false,
            }
        }
    ],
    yAxis: [{
        gridIndex: 0,
        type: 'category',
        position: 'right',
        axisLabel: {
            show: false
        },
        data: ydata,
        name: '计算资源分配与使用(单位:核小时)',
        nameTextStyle: {
            padding: [0, 180, 0, 0],
        },
        splitLine: {
            show: true,
        }
    }, {
        gridIndex: 1,
        type: 'category',
        data: ydata,
        position: 'left',
        axisLabel: {
            margin: 80,
            align: 'center',
        },
        name: '存储资源分配与使用(单位:GB)',
        nameTextStyle: {
            padding: [0, 0, 0, 180],
        },
        splitLine: {
            show: true,
        }
    }],
    series: [{
            xAxisIndex: 0,
            yAxisIndex: 0,
            name: '已使用',
            type: 'bar',
            data: barData1.used,
            itemStyle: {
                color: '#55d6f3',
            },
            barMinHeight: 20,
            z: 2,
        },
        {
            xAxisIndex: 0,
            yAxisIndex: 0,
            barGap: '-100%',
            name: '分配',
            type: 'bar',
            data: barData1.all,
            itemStyle: {
                color: '#C9D0E4',
            },
            barMinHeight: 20,
            z: 1
        },
        {
            xAxisIndex: 1,
            yAxisIndex: 1,
            name: '已使用',
            type: 'bar',
            data: barData2.used,
            itemStyle: {
                color: '#55d6f3',
            },
            barMinHeight: 20,
            z: 2
        },
        {
            xAxisIndex: 1,
            yAxisIndex: 1,
            barGap: '-100%',
            name: '分配',
            type: 'bar',
            data: barData2.all,
            itemStyle: {
                color: '#C9D0E4',
            },
            barMinHeight: 20,
            z: 1,
        }
    ]
};