Sprint Reports Wider Loss on Writedowns  WASHINGTON (Reuters) - Sprint Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=FON.N target=/stocks/quickinfo/fullquote"&gt;FON.N&lt;/A&gt; on Tuesday  reported a wider third-quarter loss due to a writedown in the  value of its long-distance business.