a small fix

Client/src/Components/Charts/BarChart/BarChart.jsx

@@ -1,7 +1,8 @@
 import React from "react";
 import "./barChart.css";
+import PropTypes from "prop-types";
 
-const BarChart = ({ checks }) => {
+const BarChart = ({ checks = [] }) => {
   return (
     <div className="bar-chart">
       {checks.map((value, index) => (
@@ -15,4 +16,8 @@ const BarChart = ({ checks }) => {
   );
 };
 
+BarChart.propTypes = {
+  checks: PropTypes.array,
+};
+
 export default BarChart;