function initArea(proceed, chart, options) {
	proceed.call(this, chart, options);
	if (this.chart.polar) {
		
		/**
		 * Overridden method to close a segment path. While in a cartesian plane the area 
		 * goes down to the threshold, in the polar chart it goes to the center.
		 */
		this.closeSegment = function (path) {
			var center = this.xAxis.center;
			path.push(
				'L',
				center[0],
				center[1]
			);			
		};
		
		// Instead of complicated logic to draw an area around the inner area in a stack,
		// just draw it behind
		this.closedStacks = true;
	}
}
Add some special init logic to areas and areasplines