添加指标排名获取判空操作

src/main/java/com/keymobile/indicators/service/report/IndicatorsReportService.java

@@ -332,7 +332,7 @@ public class IndicatorsReportService {
 			StringBuilder bestUnits = new StringBuilder("");
 			StringBuilder bestUnitsDesc = new StringBuilder("");
 			for(DriveIndCalResultDef calData : calDatas) {
-				if(calData.getRank()==1) {
+				if(calData.getRank()!=null && calData.getRank()==1) {
 					bestUnits.append(calData.getCompareObj()).append(";");
 					bestUnitsDesc.append(calData.getCompareObjDesc()).append(";");
 				}