Here is the patch to check encap_type at the earliest possible
opportunity in xfrm_user/af_key.

This will allow us to assume in esp4 that the encap_type from x->encap
is always valid.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@redhat.com>