当lineBarSet.lineBarMode的值为LineBarDrawNomal时，x轴起始位置错误

[ynwang2016]

使用Demo中LineBarChartViewController控制器的代码，把91行代码修改为
lineBarSet.lineBarMode = LineBarDrawPNHeapUp;
lineBarSet.lineBarMode = LineBarDrawNomal
页面错误
大概定位到代码因为：obj.lineBarScaler.xRatio = 0;修改为obj.lineBarScaler.xRatio = .5;就可以正常显示

// 填充定标器
    for (NSInteger i = 0; i < baseLineArray.count; i++) {
        
        BaseLineBarData * obj = baseLineArray[i];
        
        if (self.lineBarMode == LineBarDrawNomal) {
            
            obj.lineBarScaler.xRatio = 0;
        }