The advance-by parameter can contain negative numbers, but until this
CL was treated as unsigned.

Bug: v8:10072,v8:9330
Change-Id: Ib9a9c2d47ba71fa819e89502d14871af6dfc9693
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2002543
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65809}