hg: tiered-attrib/dev/langtools: fixing a crash provoked by trying to type check a structural type

[vicente.romero at oracle.com]

Changeset: a586bd328daa
Author:    vromero
Date:      2015-06-25 14:59 -0700
URL:       http://hg.openjdk.java.net/tiered-attrib/dev/langtools/rev/a586bd328daa

fixing a crash provoked by trying to type check a structural type

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java
+ test/tools/javac/tieredAttr/conditionals/TAConditional01Test.java