RFR: JDK-8275909: [JVMCI] c2v_readFieldValue use long instead of jlong for the offset parameter

[Tobias Holenstein]

On Thu, 28 Oct 2021 15:12:28 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

>> Changed the type of the displacement in from `long` to `jlong` in C2V_VMENTRY_NULL(jobject, readFieldValue, (JNIEnv* env, jobject, jobject object, jobject expected_type, long displacement, jboolean is_volatile, jobject kind_object))
>
> Looks good and trivial.

@chhagedorn and @dougxc thanks for the review!

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PR: https://git.openjdk.java.net/jdk/pull/6158