os: explicitly return nil for rootChown in root_openat.go
It is consistent with the same function in root_noopenat.go.
Change-Id: I6ddbf4dfcc725cb2023bc6bed961cc525b9c43d2
GitHub-Last-Rev:
0802150a6a8e5d4bd395b702ecc518df1e8dd4c0
GitHub-Pull-Request: golang/go#71743
Reviewed-on: https://go-review.googlesource.com/c/go/+/649417
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>