Bug 176784 always-excluding-first and always-excluding-last in item properties pop up error[00]
Details: always-excluding-first and always-excluding-last in item properties pop up error Step: 1.New a report and add a label 2.Select the label and switch properties tab. 3.Select the section and set the page break as always-excluding-first or always-excluding-last. actual result: Pop up an error excepted result: If these selection are not supported, and please remove them. If these selection are supported, it can be set to the item.
UI/org.eclipse.birt.report.designer.ui.views/src/org/eclipse/birt/report/designer/internal/ui/views/attributes/provider/GroupPropertyHandleProvider.java
* Gets the set of choices for the property; return null if the property
	 * doesn't have choice list.
	 * 
	 * @param o
	 *            the property model to inspect
	 * @return the array holds choice values
	 */
	private Object[] getChoiceValues( Object o )
	{
		Object[] values = null;
		if ( o instanceof GroupPropertyHandle )
		{
			if ( ( (GroupPropertyHandle) o ).getPropertyDefn( ).getChoices( ) != null )
			{
				IChoice[] choices = ( (GroupPropertyHandle) o ).getPropertyDefn( )
						.getChoices( )
						.getChoices( );
				if ( choices.length > 0 )
				{
					values = new Object[choices.length];
					for ( int i = 0; i < choices.length; i++ )
					{
						values[i] = choices[i].getName( );
					}
				}
			}
		}
		return values;
	}
	/**