hg: amber/amber: making enums with subclasses sealed

[vicente.romero at oracle.com]

Changeset: 335223833edc
Author:    vromero
Date:      2020-02-25 19:23 -0500
URL:       https://hg.openjdk.java.net/amber/amber/rev/335223833edc

making enums with subclasses sealed

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Check.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/TypeEnter.java