hg: kulla/dev/langtools: Retain the snippet on compile fail. Fixes NPE in REPL tool.

[robert.field at oracle.com]

Changeset: bdbb1e2d858d
Author:    rfield
Date:      2015-02-25 13:14 -0800
URL:       http://hg.openjdk.java.net/kulla/dev/langtools/rev/bdbb1e2d858d

Retain the snippet on compile fail. Fixes NPE in REPL tool.

! repl/TODO
! repl/src/impl/EvalStateImpl.java
! repl/src/impl/SnippetMaps.java
! repl/testng/test/KullaTesting.java
! repl/testng/test/ReplaceTest.java