False save confirmation dialog when exiting Word.

When closing Word (with an XWiki page opened) it asks the user if he/she wants to save the page, even if no modification where bringed to the document.
It's the classical Yes/No/Cancel message box, but it makes no sense since:

• nothing is modified
• the document is not local, it's a page from XWiki -> this is very confusing for the user (like: answering Yes would save the document locally or save the XWiki page?)