修改化验结果转换bug

rule/src/main/java/org/diagbot/rule/lis/LisApplication.java

@@ -21,7 +21,7 @@ public class LisApplication {
     private static String normal = "正常";
 
     public void lisConvertToInputs(List<PreResult> preResultList, SearchData searchData) {
-        if (preResultList != null) {
+        if (preResultList == null || preResultList.size() == 0) {
             return;
         }
         String covertValue = "";