crypto/tls: fix broken looping code in windows root CA fetcher
crypto/tls: fix broken looping code in windows root CA fetcher

R=alex.brainman, hectorchu, rsc
CC=golang-dev
http://codereview.appspot.com/5263045

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go