Add check, that passed argument is a HeapObject.

Bug: chromium:1196503
Change-Id: I23d951b5581781ad3c6867d81c765d13c329d3a8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2808936
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Auto-Submit: Patrick Thier <pthier@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73820}