后台：修复跳关的时候前置关卡无法找到时报错

gm-server/app/service/users.ts

@@ -624,7 +624,9 @@ export default class GMUsers extends Service {
         console.log(dicWar.previousGk)
         if(dicWar.previousGk && preGkIndex == -1) {
             let _dicWar = gameData.war.get(dicWar.previousGk);
-            newWarStar.push({ id: _dicWar.war_id, warType: _dicWar.warType, star: 0, stars: [] });
+            if(_dicWar) {
+                newWarStar.push({ id: _dicWar.war_id, warType: _dicWar.warType, star: 0, stars: [] });
+            }
         }
         await RScriptRecordModel.deleteByWarType(roleId, dicWar.warType);
         let insertParams: DicWar[] = [];