If it isn't, access at an offset will cause memory corruption.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: NAmos Kong <akong@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>