fix(icons): provide a full dummy path as generic filename

[abeldekat]

• I have read CONTRIBUTING.md
• I have read CODE_OF_CONDUCT.md

Resolve #2455

When the cwd is deleted, vim.filetype.match fails when MiniIcons queries with filename aaa.<the_extension>.

Solution: Add a /

@echasnovski, a test is in the making...

[echasnovski]

Thanks for the PR!

Solution: Add a /

I don't think this is the best approach here, as 1) this might be Unix specific, and 2) using files in root directory can have permission issues.

My first idea was to use pcall somewhere, but I didn't have time to test it yet.

[abeldekat]

I don't think this is the best approach here, ...

Yes, you are right. Closing...