Bug#607642: grub-pc: failure of update-grub with root over nfs

[Motiejus Jakštys]

> Does not work with root over nfs as well. Was upgrading from lenny to
> squeeze and update-grub failed:
> When I changed it, update-grub fully worked and this was the only issue
> while upgrading to squeeze. Wheee :)

Forgot to mention that I will gladly test any patches related to this
issue, as I have a bunch of root-over-nfs-lennies that need to be
upgraded.

Motiejus Jakštys