hg: jdk/jdk: 8215495: Set isCopy to JNI_FALSE if len == 0

[jcbeyler at google.com]

Changeset: c92f4465fff1
Author:    jcbeyler
Date:      2019-01-08 09:55 -0800
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/c92f4465fff1

8215495: Set isCopy to JNI_FALSE if len == 0
Summary: Set isCopy in a corner case
Reviewed-by: dholmes, phh, minqi

! src/hotspot/share/prims/jni.cpp