Fix win32 build (UNUSED is present later)
Fix win32 build (UNUSED is present later)

(cherry picked from commit 63dcc28d3efc7607d6cc42eebc4411ab50e69246)

each/bind9-collab,each/bind9-collab,each/bind9-collab,pecharmin/bind9,pecharmin/bind9,pecharmin/bind9,each/bind9-collab,each/bind9-collab,pecharmin/bind9,pecharmin/bind9,each/bind9-collab,pecharmin/bind9