hg: jdk/jdk: 8190391: nashorn "!!" of nonzero even integer var becomes false when returned

[hannes.wallnoefer at oracle.com]

Changeset: d0c784151182
Author:    hannesw
Date:      2017-11-13 15:54 +0100
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/d0c784151182

8190391: nashorn "!!" of nonzero even integer var becomes false when returned
Reviewed-by: sundar, hannesw
Contributed-by: priya.lakshmi.muthuswamy at oracle.com

! src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/types/IntType.java
! src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/JSType.java
+ test/nashorn/script/basic/JDK-8190391.js
+ test/nashorn/script/basic/JDK-8190391.js.EXPECTED