[Pidgin] #8974: Make pref formatting for XML obviously correct.

[Pidgin]

#8974: Make pref formatting for XML obviously correct.
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Reporter:  evilsporkman  |        Type:  patch    
  Status:  new           |   Component:  libpurple
 Version:  2.5.5         |    Keywords:           
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 In a couple places in libpurple/account.c, it appears as though garbage
 could be written to the XML file on 64-bit systems because plain snprintf
 was used to write to a buffer without sufficient room for -2^63, so the
 buffer might not be null-terminated. This patch makes the buffers "a round
 32 bytes" and uses g_snprintf.

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Ticket URL: <http://developer.pidgin.im/ticket/8974>
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