Prevented a possible raised exception in IrcMsgQueue.
Prevented a possible raised exception in IrcMsgQueue.

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