[Pidgin] #4814: Crash if xmpp pong timeout fires after account is disconnected

[Pidgin]

#4814: Crash if xmpp pong timeout fires after account is disconnected
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  Reporter:  nosnilmot  |       Owner:  seanegan              
      Type:  defect     |      Status:  assigned              
  Priority:  blocker    |   Milestone:  2.4.1                 
 Component:  XMPP       |     Version:                        
Resolution:             |    Keywords:  jabber xmpp ping crash
   Pending:  0          |  
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Comment (by evands at pidgin.im):

 (In [a4c67ebda7af92f03a3da8f978c16b2a4e6d0891]) Only allow one
 keepalive_timeout at a time. This prevents us from starting a
 second one and therefore losing track of the first when the server isn't
 responding within the 120 second timeout interval. Refs #4814; really
 shouldn't
 fix it, but it might.

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Ticket URL: <http://developer.pidgin.im/ticket/4814#comment:16>
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