fix on redcap sex and date of birth update

appointment-import/src/main/java/smash/appointment/parse/RedcapParser.java

@@ -40,8 +40,12 @@ public class RedcapParser {
 						subject.addLanguage(tmp[5]);
 						subject.addLanguage(tmp[6]);
 						subject.addLanguage(tmp[7]);
-						subject.setSex(tmp[3]);
-						subject.setBirthDate(tmp[2]);
+						if (!tmp[3].trim().isEmpty()) {
+							subject.setSex(tmp[3]);
+						}
+						if (!tmp[2].trim().isEmpty()) {
+							subject.setBirthDate(tmp[2]);
+						}
 
 						// for now only PRC and flying team subjects
 						if (subject.getToBeSeenAt() == null || subject.getToBeSeenAt().startsWith("P") || subject.getToBeSeenAt().startsWith("F")) {