Fix arguments in return_one_state from nfs4_op_close

And fix a locking bug while we're at it.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Mark defective last-segment check

Diagnostic prints always show it as false.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>