加一个判断当没有年度比赛的时候返回提示

jeecg-boot-master/jeecg-module-demo/src/main/java/org/jeecg/modules/demo/annualcompetitionprojectregistration/controller/AnnualCompetitionProjectRegistrationController.java

@@ -1192,6 +1192,9 @@ public class AnnualCompetitionProjectRegistrationController {
             }
 
         }
+        if(map.isEmpty()){
+            return Result.error("无可用的比赛项目");
+        }
         return Result.OK(map);
     }