(windows) fix examples/disk_usage.py: it can raise ENOENT In case we're inspecting a cdrom drive and there's no cdrom in it
(windows) fix examples/disk_usage.py: it can raise ENOENT In case we're inspecting a cdrom drive and there's no cdrom in it

ztop/psutil,ztop/psutil,ztop/psutil,ztop/psutil