bytes: explode checks for n too large
As is already done in strings package.
Change-Id: Ia45e6443ddf6beac5e70a1cc493119030e173139
GitHub-Last-Rev:
1174c250350f31eced1513169d62a8a3e679dcf6
GitHub-Pull-Request: golang/go#52348
Reviewed-on: https://go-review.googlesource.com/c/go/+/400239
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>