Bug 146159 [Regression]Changing font operation doesn't work other than the first time
Description: The first time changing operation can work well. However, Change it again, it won't work. Steps: 1.Insert lable/text to layout or master page 2.Change the font from serif to cursive, it works well 3.Change the font again Result: The action doesn't work Additional infor: build number:200606080632
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
return getColumnExpression( ( (ComputedColumnHandle) model )
					.getName( ) );
		}
		if ( model instanceof ResultSetColumnHandle )
		{
			return getResultSetColumnExpression( ( (ResultSetColumnHandle) model )
					.getColumnName( ) );
		}
		if ( model instanceof DataSetParameterHandle )
		{
			return IReportElementConstants.STOREDPROCUDURE_OUTPUT_PREFIX
					+ "[\"" + escape( ( (DataSetParameterHandle) model ).getName( ) ) + "\"]"; 
		}
		return null;
	}
	/**
	 * Returns the integer font size for string value.
	 * 
	 * @param fontSize
	 * @return
	 */
	public static int getFontSize( String fontSize )
	{
		if ( DesignChoiceConstants.FONT_SIZE_LARGER.equals( fontSize ) )
		{
			fontSize = DesignChoiceConstants.FONT_SIZE_LARGE;
		}
		else if ( DesignChoiceConstants.FONT_SIZE_SMALLER.equals( fontSize ) )
		{
			fontSize = DesignChoiceConstants.FONT_SIZE_SMALL;