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java.lang.NullPointerException: 	at net.sf.kraken.protocols.xmpp.XMPPListener.processMessage(XMPPListener.java:97)	at org.jivesoftware.smack.Chat.deliver(Chat.java:169)	at org.jivesoftware.smack.ChatManager.deliverMessage(ChatManager.java:221)	at org.jivesoftware.smack.ChatManager.access$200(ChatManager.java:42)	at org.jivesoftware.smack.ChatManager$2.processPacket(ChatManager.java:118)	at org.jivesoftware.smack.PacketReader$ListenerWrapper.notifyListener(PacketReader.java:819)	at org.jivesoftware.smack.PacketReader$ListenerNotification.run(PacketReader.java:799)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)	at java.util.concurrent.FutureTask.run(FutureTask.java:138)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:619)