Bugfix: --use-fs-snapshot now works on windows/386

Restic failed to create VSS snapshots on windows/386 with the following error:
"GetSnapshotProperties() failed: E_INVALIDARG (0x80070057)". This is fixed now.

https://github.com/restic/restic/issues/3087
https://github.com/restic/restic/pull/3090