修复不匹配关键词时的报错

都不判断数组有没有的吗?

Signed-off-by: just2333 <2969737381@qq.com>

plugins/system/add.js

@@ -395,7 +395,8 @@ export class add extends plugin {
 
     let num = 0
     if (isNaN(keyWord)) {
-      num = keyWord.trim().match(/[0-9]+/g)[0]
+      if(keyWord.trim().match(/[0-9]+/g).length>0){
+        num = keyWord.trim().match(/[0-9]+/g)[0]}
 
       if (!isNaN(num) && !textArr[this.group_id].has(keyWord) && !textArr[this.e.bot.uin].has(keyWord)) {
         keyWord = lodash.trimEnd(keyWord, num).trim()