党员年龄分布，修改返回为NaN的情况

epmet-module/data-report/data-report-server/src/main/java/com/epmet/datareport/service/evaluationindex/screen/impl/GrassrootsPartyDevServiceImpl.java

@@ -86,7 +86,11 @@ public class GrassrootsPartyDevServiceImpl implements GrassrootsPartyDevService
     @DataSource(value = DataSourceConstant.EVALUATION_INDEX,datasourceNameFromArg = true)
     @Override
     public PartymemberAgeDistributionResultDTO partymemberAgeDistribution(ParymemberFormDTO param) {
-       return screenCpcBaseDataDao.selectPartymemberAgeDistribution(param.getAgencyId());
+        PartymemberAgeDistributionResultDTO ageInfo = screenCpcBaseDataDao.selectPartymemberAgeDistribution(param.getAgencyId());
+        if(null == ageInfo){
+            ageInfo = new PartymemberAgeDistributionResultDTO();
+        }
+        return ageInfo;
     }
 
     /**