There is no need to call GetConsoleMode if we know that the file
type is not FILE_TYPE_CHAR. This is a tiny performance optimization,
as I sometimes see this call in profiles.
Change-Id: I9e9237908585d0ec8360930a0406b26f52699b92
Reviewed-on: https://go-review.googlesource.com/c/go/+/654155
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Damien Neil <dneil@google.com> Reviewed-by: Junyang Shao <shaojunyang@google.com>