Belo Profit Slides on Scandal Costs  NEW YORK (Reuters) - Belo Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=BLC.N target=/stocks/quickinfo/fullquote"&gt;BLC.N&lt;/A&gt; said on Friday that  quarterly profit fell 64 percent, weighed down by costs  connected to a recent scandal involving inflated circulation  data at its Dallas Morning News newspaper.