... by making explicit that the value is a Smi.

Bug: v8:9989
Change-Id: I9f65030cf665e16c2fb22f5f77e25daf3cfb1cf1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1924260Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65081}