Fix smb2.lock.rw-shared with async I/O enabled

[Jeremy Allison]

On Fri, Jul 13, 2012 at 12:44:48PM +0200, Volker Lendecke wrote:
> Hi!
> 
> Attached find a patch for $SUBJECT. Someone who feels
> familiar with the SMB2 server please comment/ack/push it.

Great catch ! Thanks. Pushed to master, and I'll
open a bug for 3.6.next.

Cheers,

	Jeremy.