bpo-29248: Fix os.readlink() on Windows (GH-5577)


The PrintNameOffset field of the reparse data buffer
was treated as a number of characters instead of bytes.
(cherry picked from commit 3c34aad4e7a95913ec7db8e5e948a8fc69047bf7)

Co-authored-by: SSE4 <tomskside@gmail.com>
3 files changed