Fixes the fact that on IE, onModuleLoad() can sometimes be called before the
document is entirely loaded, because " document.readyState == 'interactive'" is
a smidge too early.

Patch by: jgw
Review by: knorton



git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@1223 8db76d5a-ed1c-0410-87a9-c151d255dfc7