[Pidgin] #6036: certificate.c segfault on NULL ptr dereference (patch attached)

[Pidgin]

#6036: certificate.c segfault on NULL ptr dereference (patch attached)
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 Reporter:  toofishes  |       Type:  defect
   Status:  new        |   Priority:  minor 
Component:  libpurple  |    Version:  2.4.2 
 Keywords:             |    Pending:  0     
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 A "TODO: Unsafe?" comment proved to be quite true, and it bit me when
 attempting to patch the default certificate path used by libpurple (which
 on a side note seems odd to hardcode to something pidgin provides with no
 option to set a system path, but that is for a different report).

 Anyway, the patch is attached, should be pretty self-explanatory.
 Apparantly one of our system certs did not have a dn element so it died
 when attempting to look it up and strcmp() it.

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Ticket URL: <http://developer.pidgin.im/ticket/6036>
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