A few lines earlier the code bails out in case len is 0. Checking for
buf->len < 1 is the same as checking for buf->len == 0. Since len is
guaranteed to be > 0 here the check len > buf->len implicitly checks
for buf->len == 0, i.e. the second test can be removed.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
8fc4c99496