Correct ioctl read and write_ptr tests
Correct ioctl read and write_ptr tests

Looks like a copy/paste error might have caused this

MarkusJais/nix-rust,nix-rust/nix,geofft/nix-rust,carllerche/nix-rust,carllerche/nix-rust,asomers/nix,MarkusJais/nix-rust,nix-rust/nix,xd009642/nix,carllerche/nix-rust,geofft/nix-rust,asomers/nix,geofft/nix-rust,MarkusJais/nix-rust,xd009642/nix,xd009642/nix