The ESN replay window was already fully initialized in
xfrm_alloc_replay_state_esn(). No need to copy it again.

Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: NMathias Krause <minipli@googlemail.com>
Acked-by: NSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>