Fix bug in UnifyAst where non-null array types failed to canonicalize.

http://gwt-code-reviews.appspot.com/1469802/

Review by: jbrosenberg@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10416 8db76d5a-ed1c-0410-87a9-c151d255dfc7
1 file changed