[Pidgin] #9703: add a GHashTable cache for conversations to speed up find_conversation_with_account

[Pidgin]

#9703: add a GHashTable cache for conversations to speed up
find_conversation_with_account
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 Reporter:  tmm1   |        Owner:  darkrain42
     Type:  patch  |       Status:  closed    
Milestone:  2.6.0  |    Component:  libpurple 
  Version:  2.5.8  |   Resolution:  fixed     
 Keywords:         |  
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Changes (by aman at tmm1.net):

  * status:  new => closed
  * resolution:  => fixed
  * milestone:  Patches Needing Improvement => 2.6.0


Comment:

 (In [7624afb13d9554cac3283113c46ff21a2438f2ae]):[[BR]]
 More efficient purple_find_conversation_with_account. Closes #9703.

 Patch mostly from Aman "tmm1" Gupta; I added the g_list_prepend calls.
 The functionality is going to get whacky when dealing with chats that
 share the same name ("MSN Chat"), but
 purple_find_conversation_with_account
 doesn't work for those in any sense of the word 'work', so...

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Ticket URL: <http://developer.pidgin.im/ticket/9703#comment:4>
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