tipc: remove an unnecessary NULL check
This is never called with a NULL "buf" and anyway, we dereference 's' on the lines before so it would Oops before we reach the check. Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Acked-by: NYing Xue <ying.xue@windriver.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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