Set proper precision on loop index for variable init Previously the index variable was missing a precision. This may have been behind loop-based init failing on some Android platforms. BUG=chromium:735497 TEST=angle_unittests Change-Id: I0307891dfb2edf6c52efd5b495f602b380263d65 Reviewed-on: https://chromium-review.googlesource.com/822413 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>