[Pidgin] #12862: resolved in dnssrv not firing callback if the dns read fails

[Pidgin]

#12862: resolved in dnssrv not firing callback if the dns read fails
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Reporter:  elo8841  |        Type:  defect     
  Status:  new      |   Component:  libpurple  
 Version:  2.7.5    |    Keywords:  xmpp dnssrv
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 The problem i am experiencing right now is that, when my code is busy and
 didn't handled the dnssrv resolved in time. The read in dnssrv resolved
 fails. When the read fails, the callback to jabber is not fired but the
 query data is freed. This causes crash when i attempt to perform jabber
 close because it attempts to free the query data again.

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Ticket URL: <http://developer.pidgin.im/ticket/12862>
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