life: fix for new slice rules
life: fix for new slice rules

R=golang-dev, adg, rsc
CC=golang-dev
http://codereview.appspot.com/2341049

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

tav/go,tav/go,tav/go,tav/go,tav/go,tav/go,tav/go