D.R. Horton Profit Up 52 Percent  CHICAGO (Reuters) - Homebuilder D.R. Horton Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DHI.N target=/stocks/quickinfo/fullquote"&gt;DHI.N&lt;/A&gt; on  Wednesday posted a 52 percent increase in quarterly profit on  strong orders for new homes and forecast better-than-expected  results for 2005.