Added new assert to ensure that object is not null.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@3232 b35dd754-fafc-0310-a699-88a17e54d16e

test/org/jivesoftware/smackx/muc/MultiUserChatTest.java

@@ -149,6 +149,7 @@ public class MultiUserChatTest extends SmackTestCase {
             msg = muc2.nextMessage(1000);
             assertNotNull("First message is null", msg);
             DelayInformation delay = (DelayInformation) msg.getExtension("x", "jabber:x:delay");
+            assertNotNull("Message contains no delay information", delay);
             SimpleDateFormat UTC_FORMAT = new SimpleDateFormat("yyyyMMdd'T'HH:mm:ss");
             UTC_FORMAT.setTimeZone(TimeZone.getDefault());
             System.out.println(UTC_FORMAT.format(delay.getStamp()));