EXT: NetSock_Accept() is calling the wrong label when validating the initial address length.

[wes-jmagasrevy]

When validating the initial address length, NetSock_Accept calls 'exit_err_acccept' instead of 'exit_lock_fault'. The latter should be used because the former causes the code to release an un-acquired global network lock before returning to the caller. This does not cause a functional issue, though.