This fixes a dropped err in runPreauthz(). Change-Id: I46f98d0a21e037a49e4b779895214538d1162376 Reviewed-on: https://go-review.googlesource.com/c/crypto/+/206237 Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com> Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>