Fixed error when audited packet is not related to a session (e.g. legacy network user). JM-979

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk@7133 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/wildfire/audit/spi/AuditorImpl.java

@@ -381,10 +381,10 @@ public class AuditorImpl implements Auditor {
         public AuditPacket(Packet packet, Session session) {
             element = docFactory.createElement("packet", "http://www.jivesoftware.org");
             creationDate = new Date();
-            if (session.getStreamID() != null) {
+            if (session != null && session.getStreamID() != null) {
                 element.addAttribute("streamID", session.getStreamID().toString());
             }
-            switch (session.getStatus()) {
+            switch (session == null ? 0 : session.getStatus()) {
                 case Session.STATUS_AUTHENTICATED:
                     element.addAttribute("status", "auth");
                     break;