RFR: 8295014: Remove unnecessary explicit casts to void* in CHeapObjBase

[David Holmes]

On Sun, 9 Oct 2022 02:52:37 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Please review this change to CHeapObjBase that removes unnecessary explicit
> casts from char* to void*.
> 
> Testing: mach5 tier1

Looks good - and cleaner! Thanks.

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10623