International Paper Has Loss After Charge  NEW YORK (Reuters) - International Paper Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=IP.N target=/stocks/quickinfo/fullquote"&gt;IP.N&lt;/A&gt;, the  world's largest forest products company, on Tuesday reported a  third-quarter loss after charges for the write-down of Canadian  assets.