Fixed NPE caused when removing non-authenticated sessions.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@286 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/messenger/XMPPAddress.java

@@ -380,4 +380,13 @@ public class XMPPAddress implements Cacheable {
             return cachedPrep.hashCode();
         }
     }
+
+    /**
+     * Returns true if all the portions of the addresss are null.
+     *
+     * @return true if all the portions of the addresss are null.
+     */
+    public boolean isEmpty() {
+        return name == null && host == null && resource == null;
+    }
 }

src/java/org/jivesoftware/messenger/spi/SessionManagerImpl.java

@@ -803,7 +803,7 @@ public class SessionManagerImpl extends BasicModule implements SessionManager,
             offline.setAvailable(false);
             router.route(offline);
         }
-        if (session.getAddress() != null && routingTable != null) {
+        if (session.getAddress() != null && routingTable != null && !session.getAddress().isEmpty()) {
             routingTable.removeRoute(session.getAddress());
             if (sessionMap != null) {
                 if (sessionMap.isEmpty()) {