[libvirt] freecell gives out bytes instead of kilobytes

[Gerrit Slomma]

Daniel P. Berrange schrieb:
> For command line tools like virsh I prefer to have it consistently
> report in the same units, so if someone wants to script it from
> the shell they don't have to concern themselves with changing units.
>
> All the other virsh commands report in KB, so the simple fix is to
> just divide by 1024.

A-OK.