Delta Suffers Setback with Debt Committee  NEW YORK (Reuters) - Delta Air Lines Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DAL.N target=/stocks/quickinfo/fullquote"&gt;DAL.N&lt;/A&gt; suffered  a setback this week when a committee of creditors scotched one  of the company's early debt renegotiation efforts, but the  struggling airline still has a chance of restructuring its debt  without filing for bankruptcy, analysts said on Friday.