modify the npe for ScheduledMailTask

cat-home/src/main/java/com/dianping/cat/report/page/JsonBuilder.java

@@ -38,7 +38,6 @@ public class JsonBuilder {
 	private Gson m_gson = new GsonBuilder().registerTypeAdapter(Timestamp.class, new TimestampTypeAdapter())
 	      .setDateFormat("yyyy-MM-dd HH:mm:ss").setFieldNamingStrategy(m_fieldNamingStrategy).create();
 
-	
 	@SuppressWarnings({ "unchecked", "rawtypes" })
    public Object parse(String json,Class clz){
 		return m_gson.fromJson(json, clz);
@@ -73,6 +72,6 @@ public class JsonBuilder {
 			String dateFormatAsString = format.format(new Date(src.getTime()));
 			return new JsonPrimitive(dateFormatAsString);
 		}
-
 	}
+	
 }

cat-home/src/main/java/com/dianping/cat/system/notify/ScheduledMailTask.java

@@ -134,7 +134,7 @@ public class ScheduledMailTask implements Task, LogEnabled {
 						Transaction t = Cat.newTransaction("ScheduledReport", domain);
 
 						try {
-							String names = report.getNames();
+							String names = String.valueOf(report.getNames());
 							String content = renderContent(names, domain);
 							String title = renderTitle(names, domain);
 							List<String> emails = m_scheduledManager.queryEmailsBySchReportId(report.getId());