[Pidgin] #15458: Avoid duplicate MUC history messages

[Pidgin]

#15458: Avoid duplicate MUC history messages
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 Reporter:  Kha                     |       Owner:
     Type:  patch                   |      Status:  new
Milestone:  Patches Needing Review  |   Component:  pidgin (gtk)
  Version:                          |  Resolution:
 Keywords:  muc history backlog     |
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Changes (by MarkDoliner):

 * type:  enhancement => patch
 * milestone:   => Patches Needing Review


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Ticket URL: <https://developer.pidgin.im/ticket/15458#comment:2>
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