[Pidgin] #2833: Libpurple doesn't prevent duplicate accounts

[Pidgin]

#2833: Libpurple doesn't prevent duplicate accounts
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 Reporter:  datallah   |       Owner:       
     Type:  defect     |      Status:  new  
 Priority:  minor      |   Milestone:  3.0.0
Component:  libpurple  |     Version:  2.1.1
 Keywords:             |     Pending:  0    
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 #2269 was reported because you can create duplicate accounts that aren't
 persisted when pidgin is restarted.

 I implemented a fix in the pidgin UI that checks whether the account
 exists before saving it, but it seems like this is something that
 libpurple should be doing.  Perhaps something as simple as making
 purple_accounts_add() return a boolean or an error code would be enough.

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Ticket URL: <http://developer.pidgin.im/ticket/2833>
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