add 错误提示

nb-service/app-assistant/src/main/java/com/nb/app/assistant/service/LocalAssistantUserBindService.java

@@ -173,6 +173,9 @@ public class LocalAssistantUserBindService extends BaseService<AssistantUserBind
     @Override
     public boolean handleBindResult(HandleBindResult source) {
         AssistantUserBindEntity userBind = this.findById(source.getBindId());
+        if(userBind==null){
+            throw new CustomException("该绑定关系不存在");
+        }
         Boolean isDefault=false;
         if(source.getAgree()){
             //判断是否重复绑定