Stocks Seen Flat as Microsoft Weighs  NEW YORK (Reuters) - U.S. stock futures fell slightly on  Friday, indicating stocks would open little changed, as Wall  Street weighed climbing oil prices and a disappointing revenue  outlook from software maker Microsoft Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MSFT.O target=/stocks/quickinfo/fullquote"&gt;MSFT.O&lt;/A&gt;.