{Smi::ToInt} has only one character more.

R=mstarzinger@chromium.org

Bug: v8:9810
Change-Id: I1e91bb3623a354ceeee1dc93822011a6809281d5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1886922Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64633}