Bug 192792 Drag to change xtab width will cause xls preview failure[1203]
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/ExcelUtil.java
{
	public static String ridQuote( String val )
	{
		if ( val.charAt( 0 ) == '"' && val.charAt( val.length( ) - 1 ) == '"' )
		{
			return val.substring( 1, val.length( ) - 1 );
		}
		return val;
	}
	
	public static String getValue( String val )
	{
		if ( val == null )
		{
			return StyleConstant.NULL;
		}
		if ( val.charAt( 0 ) == '"' && val.charAt( val.length( ) - 1 ) == '"' )
		{
			return val.substring( 1, val.length( ) - 1 );
		}
		return val;
	}
	public static int convertToPt( String size )