Fix incorrect use of ptr by TPH

Bug: v8:9533
Change-Id: I8c8f6d7e2fddae13a9a01a77ac26b1f2ad338889
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2039430Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Steve Blackburn <steveblackburn@google.com>
Cr-Commit-Position: refs/heads/master@{#66147}

src/heap/heap-inl.h

@@ -287,7 +287,7 @@ Address Heap::DeserializerAllocate(AllocationType type, int size_in_bytes) {
   if (V8_ENABLE_THIRD_PARTY_HEAP_BOOL) {
     AllocationResult allocation = tp_heap_->Allocate(
         size_in_bytes, type, AllocationAlignment::kWordAligned);
-    return allocation.ToObjectChecked().ptr();
+    return allocation.ToObjectChecked().address();
   } else {
     UNIMPLEMENTED();  // unimplemented
   }