hg: jdk/sandbox: 8243941: build issue introduced with the push of 8242237

[chris.hegarty at oracle.com]

Changeset: 5b2fa9b1ae7a
Author:    sspitsyn
Date:      2020-04-28 04:46 +0000
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/5b2fa9b1ae7a

8243941: build issue introduced with the push of 8242237
Summary: Use right type to declare function argument
Reviewed-by: iignatyev

! test/hotspot/jtreg/serviceability/jvmti/HiddenClass/libHiddenClassSigTest.cpp