auth: use snprintf() return value
authorJulien Danjou <julien@danjou.info>
Tue, 7 Apr 2009 09:55:30 +0000 (11:55 +0200)
committerJulien Danjou <julien@danjou.info>
Fri, 10 Apr 2009 07:59:49 +0000 (09:59 +0200)
That save us from a strlen().

Signed-off-by: Julien Danjou <julien@danjou.info>

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