Fixes a bug where DateTimeFormat would accept 0 as a valid month or day. Also
adds a test to demonstrate the fix.

patch by: shanjianli
review by: ajr


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@5257 8db76d5a-ed1c-0410-87a9-c151d255dfc7
2 files changed