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/metadata/ExtensionModelPropertyDefn.java
/**
	 * Constructs the extension element property definition with an effective
	 * extension property.
	 * 
	 * @param extPropertyDefn
	 *            the effective extension property definition
	 * @param messages
	 *            the messages providing the localized messages
	 */
	public ExtensionModelPropertyDefn( IPropertyDefinition extPropertyDefn,
			IMessages messages )
	{
		extProperty = extPropertyDefn;
		assert extProperty != null;
		MetaDataDictionary dd = MetaDataDictionary.getInstance( );
		type = dd.getPropertyType( extProperty.getType( ) );
		name = extProperty.getName( );
		defaultValue = extProperty.getDefaultValue( );
		this.messages = messages;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.metadata.PropertyDefn#getValueType()
	 */
	public int getValueType( )
	{
		return EXTENSION_MODEL_PROPERTY;
	}
	/*