If more than one boot device has been selected, the currently selected
number displayed in the menu is wrong.
The tiny patch I am attaching makes sure that only the first boot device
is considered.
The patch has to be applied on top of the original patch.

Signed-off-by: Stefano Stabellini <stefano.stabellini@citrix.com>

> The attached patch implements a mini BIOS menu for choosing a
> non-default boot device. When a guest starts it'll display 
> 
>    'Press F10 to select boot device'
> 
> And wait 3 seconds, before continuing with the normal boot device. If
> they press the F10 key, a menu is shown allowing a choice between
> floppy, harddisk, cdrom and network (PXE).
> 
> I can't take credit for this originally - Jeremy Katz wrote it for KVM,
> I merely re-diffed the patch to work against Xen's QEMU/BIOS code tree.
> It has been tested in Fedora successfully against 3.1.x and 3.2.x
> 
>    Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
>    CC: Jeremy Katz <katzj@redhat.com>
>