[PATCH] nfsd4: fix open seqid incrementing in lock

In the case of a lock which introduces a new lockowner, the openowner's
sequence id should be incremented, even when the operation fails, if the
error is a sequence-id-mutating error.  The current code fails to do that
in some cases.  Fix this by using the same sequence-id-incrementing
mechanism that all other such operations use.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>