[Pidgin] #1070: Crash as an MSN file xfer is destroyed

[Pidgin]

#1070: Crash as an MSN file xfer is destroyed
-----------------------+----------------------------------------------------
 Reporter:  evands     |       Owner:     
     Type:  defect     |      Status:  new
 Priority:  minor      |   Milestone:     
Component:  libpurple  |     Version:  2.0
 Keywords:             |     Pending:  0  
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 {{{
 Thread 0 Crashed:
 0   Libpurple                   0x06a28a1c purple_find_buddy + 80
 1   Libpurple                   0x06a1899b purple_xfer_cancel_remote + 120
 2   Libpurple                   0x06a66724 msn_slp_call_destroy + 182
 3   Libpurple                   0x06a66b0f msn_slplink_destroy + 145
 4   Libpurple                   0x06a688bf msn_switchboard_destroy + 88
 5   Libpurple                   0x06a579fd msn_cmdproc_process_cmd + 295
 6   Libpurple                   0x06a64885 read_cb + 344
 }}}

 There is no use of purple_xfer_ref() and purple_xfer_unref() in the msn
 code. Perhaps the xfer associated with the slp should be ref()'d when set
 and unref()'d when the slp is destroyed?

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Ticket URL: <http://developer.pidgin.im/ticket/1070>
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