RFR: 8244971: Zero VM is broken after JDK-8241825 (COMPRESSED_CLASS_POINTERS_DEPENDS_ON_COMPRESSED_OOPS not defined)

[jiefu(傅杰)]

Hi all,

May I get reviews for this fix?

JBS:    https://bugs.openjdk.java.net/browse/JDK-8244971
Webrev: http://cr.openjdk.java.net/~jiefu/8244971/webrev.00/

Thanks a lot.
Best regards,
Jie