* Due to the partition gymnastic that is required by the hack that is ISOHybrid,
some ISOHybrid images that are written in DD mode, such as Ubuntu 20.10, may
result in Windows somehow "losing" the target disk from some of its listings.
* This "removal" can be seen for instance if you have diskpart already open and
issue 'list disk' after Rufus 3.13 completed its image writing.
* In the worst case scenario, Windows may flat out refuse to access the disk at
the sector level be it in diskpart or disk manager, which forces ones to clear
the partition tables on Linux or some other OS to be able to "recover" the disk.
* This appears to be mostly due to Windows VDS cache (which Microsoft assures
should be able to do a proper job of refreshing itself on its own, in the same
stride as they also feel the need to introduce IVdsService::Refresh whose sole
purpose appears to work around a limitation that Microsoft knows exists) not
being in sync with the actual disk layout.
* So we now add calls to VDS layout refresh where needed, to work around the issue.
* Also fix an ext2fs Coverity warning.
Pete Batard