Fixing a bug in CellTree where we always pass null as the key for the rendered object instead of passing the key.

Review at http://gwt-code-reviews.appspot.com/1070801

Review by: pdr@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9179 8db76d5a-ed1c-0410-87a9-c151d255dfc7
2 files changed