Wal-Mart Dec. Sales Still Seen Up 1-3 Pct  CHICAGO (Reuters) - Wal-Mart Stores Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=WMT.N target=/stocks/quickinfo/fullquote"&gt;WMT.N&lt;/A&gt; said on  Saturday it still expects a 1 percent to 3 percent increase in  December sales at its U.S. stores open at least a year as sales  of general merchandise and winter items improved in the latest  week.