Copy lock messages before swapping bytes because we
    may use the lock message struct again after calling send_lock_msg()
    
    Signed-off-by: Ryan McCabe <rmccabe@redhat.com>
    Reviewed-by: Lon Hohberger <lhh@redhat.com>
    Reviewed-by: Fabio M. Di Nitto <fdinitto@redhat.com>