修复算例管理. tasks为空时列表渲染出错的问题

zhangzengfei

2021-03-29 b0947006bc9b9f69dca30e7101081bdd4bd7f7c4

 src/components/subComponents/MultiRangeSlider.vue

@@ -636,7 +636,6 @@
          this.rangeArr.push(rang[j]);
        }
      }

      this.rangeArrBackup = JSON.stringify(this.rangeArr);
    },
    redraw(onlyDraw = true) {