Fix for uncaught exception in IrcState.addMsg.
Fix for uncaught exception in IrcState.addMsg.

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