fix: gazelle failing on Windows with "panic: runtime error: invalid memory address or nil pointer dereference"

[bartoszpop]

This pull request fixes bazel run gazelle failing on Windows with "panic: runtime error: invalid memory address or nil pointer dereference" if there is a path with at least 2-levels deep directory.

Fixes #1871

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[aignas]

The PR looks good to me and I would love to merge it since we have cut a 0.32.2 release. Could you please rebase and update the CHANGELOG.md please?

[bartoszpop]

The PR looks good to me and I would love to merge it since we have cut a 0.32.2 release. Could you please rebase and update the CHANGELOG.md please?

@aignas sorry for the delay, I'll do it by the end of this week.