Document creation - wrong initial file size

[lscorcia]

In WebDavSqlStoreDocument constructor, when creating a new document the initial file size is set to 1 instead of zero, this causes errors in the Litmus tests.

The fix is to simply correct the line as _filesize = lastmod?.Size ?? 0; .

[Winterleaf]

Thanks

[Winterleaf]

Putting fixes into next version will publish soon.