[Pidgin] #819: Fix: disappearing buddy icons

[Pidgin]

#819: Fix: disappearing buddy icons
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 Reporter:  vampire    |       Type:  patch
   Status:  new        |   Priority:  minor
Component:  libpurple  |    Version:  2.0  
 Keywords:             |    Pending:  0    
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 Here's a quick fix for the disappearing buddy icons bug. Looks like this
 happens in purple_buddy_icons_find() when caching is disabled, and
 purple_buddy_icon_update() then removes the settings from the blist.

 Closes: #491

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Ticket URL: <http://developer.pidgin.im/ticket/819>
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