Merged r17711 into 3.21 branch.

Fix overflow in TypedArray initialization function

BUG=chromium:319120
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/68213014

git-svn-id: https://v8.googlecode.com/svn/branches/3.21@17714 ce2b1a6d-e550-0410-aec6-3dcde31c8c00