Fix getdents default error code
The current build is broken due to a recent Cargo.lock update on RedoxFS. The system does not find any files in /usr/lib/init.d
due to EBADF. This MR should fix the problem.
I am not sure if this deserves a version bump, because it is debatably a bug fix.
It will need to be pushed to crates.io. If we decide to bump the version, RedoxFS will need a new Cargo.lock.