hg: jdk/sandbox: 8240246: Avoid cast_to_oop from char*

[chris.hegarty at oracle.com]

Changeset: ac3371755ede
Author:    kbarrett
Date:      2020-03-02 14:45 -0500
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/ac3371755ede

8240246: Avoid cast_to_oop from char*
Summary: Change type of gtest object from char[] to unsigned char[].
Reviewed-by: dholmes

! test/hotspot/gtest/oops/test_oop.cpp