We were using >1 instead of <=1. Caused false errors in Debug.

BUG=angle:716

Change-Id: I7072df99f208bd2e0a687143faeef6c9be79728e
Reviewed-on: https://chromium-review.googlesource.com/210990Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>