Null race condition

[daniele-athome]

java.lang.NullPointerException: Attempt to invoke virtual method 'void org.kontalk.service.msgcenter.MessageCenterService$IdleConnectionHandler.reset()' on a null object reference
       at org.kontalk.service.msgcenter.MessageCenterService.sendPacket(MessageCenterService.java:900)
       at org.kontalk.service.msgcenter.MessageCenterService.sendPacket(MessageCenterService.java:890)
       at org.kontalk.service.msgcenter.RosterListener.userSubscribed(RosterListener.java:134)
       at org.kontalk.service.msgcenter.RosterListener.entriesUpdated(RosterListener.java:106)
       at org.jivesoftware.smack.roster.Roster.fireRosterChangedEvent(Roster.java:1253)
       at org.jivesoftware.smack.roster.Roster.access$2200(Roster.java:91)
       at org.jivesoftware.smack.roster.Roster$RosterPushListener.handleIQRequest(Roster.java:1754)
       at org.jivesoftware.smack.AbstractXMPPConnection$3.run(AbstractXMPPConnection.java:1159)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
       at java.lang.Thread.run(Thread.java:776)