fix error

src/components/AdminPage/Wristband/LocStatus/index.js

@@ -89,6 +89,7 @@ class LocStatus extends React.Component{
 
     render (){
         let {i18n} = this.props;
+        console.log(this.state.list);
         return (
             <Container fluid>
                 <Segment className="clearfix">

src/tools/index.js

@@ -7,6 +7,7 @@
  * @return {string}
  */
 export const padding = (str, lng = 0, arrow = -1, txt = '0') => {
+    if (!str) str = '';
     if (typeof str != 'string') str = str.toString();
     if (typeof txt != 'string') txt = txt.toString();
     if (!isFinite(lng) || lng <= 0) return str;