hg: amber/amber: providing better typing to ldc(), which will also avoid redundant casts

[vicente.romero at oracle.com]

Changeset: a968514d842b
Author:    vromero
Date:      2017-10-04 16:35 -0400
URL:       http://hg.openjdk.java.net/amber/amber/rev/a968514d842b

providing better typing to ldc(), which will also avoid redundant casts

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/ConstablesVisitor.java
! test/langtools/tools/javac/specialConstantFolding/harness/tests/ConstantFoldingOfMethodTypeDiffContextsTest.java