[Buildbot] #3094: IRC plugin throws a traceback

[Buildbot trac]

#3094: IRC plugin throws a traceback
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Reporter:  sa2ajj  |       Owner:
    Type:  defect  |      Status:  new
Priority:  major   |   Milestone:  0.9.0
 Version:  master  |  Resolution:
Keywords:  irc     |
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Comment (by Ben):

 See https://github.com/buildbot/buildbot/pull/1420, looks like #2714 is
 quite done though.

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Ticket URL: <http://trac.buildbot.net/ticket/3094#comment:2>
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