Fix bug #1082448, User.username traceback
Fix bug #1082448, User.username traceback

kblin/supybot-gsoc,mazaclub/mazabot-core,mazaclub/mazabot-core,haxwithaxe/supybot,Ban3/Limnoria,raboof/supybot,Ban3/Limnoria,buildbot/supybot,prashantpawar/supybot-rothbot,frumiousbandersnatch/supybot-code,ProgVal/Limnoria-test,jeffmahoney/supybot,ProgVal/Limnoria-test