[O] Make min x value of overall-line a whole number

src/pages/overall/overall-line/overall-line.ts

@@ -56,7 +56,7 @@ export default class OverallLine extends Vue
         },
         yAxis:
         {
-            min: (value: any) => value.min,
+            min: (value: any) => Math.floor(value.min),
             max: (value: any) => value.max
         }
     };