[Pidgin] #8810: XMPP: Unable to unset topic (set topic to "")

[Pidgin]

#8810: XMPP: Unable to unset topic (set topic to "")
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 Reporter:  darkrain42              |           Owner:  darkrain42
     Type:  defect                  |          Status:  new       
Milestone:  Patches Needing Review  |       Component:  XMPP      
  Version:  2.5.5                   |      Resolution:            
 Keywords:  chat topic              |   Launchpad_bug:            
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Changes (by darkrain42):

  * milestone:  => Patches Needing Review


Comment:

 I've attached a patch which fixes this and also fixes the prpl to handle
 receiving an empty subject (xmlnode_get_data(<subject/>) returns NULL --
 I'm not sure what I think about that, but changing that is much more
 likely to cause issues, so just fix the handling for <subject/>).

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Ticket URL: <http://developer.pidgin.im/ticket/8810#comment:1>
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