Bug 314203 Unnecessary round mode will cause number disappear
core/org.eclipse.birt.core/src/org/eclipse/birt/core/format/NumberFormatter.java
* 
	 * decimalSeparator is the localized decimal separator.
	 * 
	 * currently the exponential character isnt exposed by JDK, so just leave it
	 * for future
	 * 
	 * @see definition of java.text.DecimalFormatSymbols#exponential
	 */
	protected char decimalSeparator;
	
	/**
	 * Do we use hex pattern?
	 */
	private boolean hexFlag;
	
	private int roundPrecision;
	
	private String realPattern;
	/**
	 * used to indicate whether to use ICU symbols
	 */
	private boolean digitSubstitution;
	private RoundingMode roundingMode = RoundingMode.HALF_UP;
	/**
	 * constructor with no argument
	 */
	public NumberFormatter( )
	{
		applyPattern( null );
	}