Before the Bell: Krispy Kreme Down 11 Pct  NEW YORK (Reuters) - Shares of Krispy Kreme Doughnuts Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=KKD.N target=/stocks/quickinfo/fullquote"&gt;KKD.N&lt;/A&gt; fell 11 percent before the bell on Monday after the  struggling doughnut shop chain reported a quarterly net loss  because of impairment charges and store closing costs.