Avoid doble call to hash() in lookup()
Avoid doble call to hash() in lookup()

It is better to pass the hash value to linkhash
instead of calling to lookup all the times inside
of linkhash().

k0gaMSX/kcc,8l/scc,k0gaMSX/scc,k0gaMSX/kcc,k0gaMSX/scc,8l/scc,k0gaMSX/scc,8l/scc