hg: jigsaw/jake/langtools: DocTrees.getElement shouldn't crash on an invalid package#member reference.

[jan.lahoda at oracle.com]

Changeset: 6cacf96c868b
Author:    jlahoda
Date:      2016-03-14 20:58 +0100
URL:       http://hg.openjdk.java.net/jigsaw/jake/langtools/rev/6cacf96c868b

DocTrees.getElement shouldn't crash on an invalid package#member reference.

! src/jdk.compiler/share/classes/com/sun/tools/javac/api/JavacTrees.java
! test/tools/javac/doctree/ReferenceTest.java