[code smell] simplified while loop boolean in getEpidemicStatsitics

iTrust/src/edu/ncsu/csc/itrust/action/ViewDiagnosisStatisticsAction.java

@@ -260,7 +260,8 @@ public class ViewDiagnosisStatisticsAction {
         cal.set(Calendar.YEAR, startCal.get(Calendar.YEAR));  //cal's year then gets set to start's year
         ArrayList<DiagnosisStatisticsBean> dbList = new ArrayList<DiagnosisStatisticsBean>();
         
-        while( cal.getTime().before(lower) && cal.get(Calendar.YEAR) != lowerCal.get(Calendar.YEAR)) {
+        boolean differentYears = cal.get(Calendar.YEAR) != lowerCal.get(Calendar.YEAR);
+        while( cal.getTime().before(lower) && differentYears) {
             dbList.add( diagnosesDAO.getCountForWeekOf(icdCode, zip, cal.getTime()) );
             cal.add(Calendar.YEAR, 1);
             cal.set(Calendar.WEEK_OF_YEAR, weekOfYr);