Bug 120317 Set "dimension" property to 3D in "properties" view, error appears in layout editor.
Description: Set "dimension" property to 3D in "properties" view, error appears in layout editor. Steps to reproduce: 1. Add a 2D chart in property editor. 2. Set its dimension property to "three-dimension" in properties view. 3. Error appears in chart.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/PropertyHandle.java
/**
	 * Constructs the handle for a top-level property with the given element
	 * handle and the definition of the property.
	 * 
	 * @param element
	 *            a handle to a report element
	 * @param prop
	 *            the definition of the property.
	 */
	public PropertyHandle( DesignElementHandle element, ElementPropertyDefn prop )
	{
		super( element );
		propDefn = prop;
	}
	
	public IElementPropertyDefn getPropertyDefn( )
	{
		return propDefn;
	}
	
	public IPropertyDefn getDefn( )
	{
		return propDefn;
	}
	
	public Object getValue( )
	{
		Object value = getElement( ).getProperty( getModule( ), propDefn );
		if ( value instanceof ReferenceValue )
			return ReferenceValueUtil.needTheNamespacePrefix(