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/extension/PeerExtensibilityProvider.java
}
		else if ( isExtensionModelProperty( propName ) )
		{
			
			
			assert reportItem != null;
			return reportItem.getProperty( propName );
		}
		return extensionPropValues.get( propName );
	}
	/**
	 * Sets the value for extension property or extension model property.
	 * 
	 * @param prop
	 *            the definition of the property
	 * @param value
	 *            the value to set
	 */
	public void setExtensionProperty( ElementPropertyDefn prop, Object value )
	{
		if ( isExtensionXMLProperty( prop.getName( ) ) )
		{
			if ( reportItem != null )
			{
				try
				{
					if ( value != null )
					{
						byte[] raw = null;
						try