fix CryptoBasicFileAttributes #GH-141

[revintec]

the old implementation returns wrong file size for symbolic links, e.g. file symlink after ln -s . symlink should be 1

[CLAassistant]

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[overheadhunter]

Hi, can you please:

1. Create a bug report claiming that symlink size is incorrect and provide some official source documenting what the correct size of a symlink should be like? E.g. man stat:

   The st_size field gives the size of the file (if it is a regular file or a symbolic link) in bytes. The size of a symbolic link is the length of the pathname it contains, without a terminating null byte.

2. When "fixing" the symlink size, please don't break the directory size 😉

[overheadhunter]

Thanks for creating the corresponding issue. The change looks reasonable, however I would like to ask you to stay with the switch statement, as with the ternary operator we lose compile-time exhaustiveness checks.

Furthermore simply moving SYMLINK from one case to the other introduces a significantly smaller diff.

[overheadhunter]

Thank you very much!