Revision 616

if reading a geotiff withour CRS fails, try with defautl CRS

	 * @see #readGridFromGeoTiff(File, CoordinateReferenceSystem)
	 */
	public static GridCoverage2D readGridFromGeoTiff(File file)
			throws Exception {
		try {
			return readGridFromGeoTiff(file, null);
		} catch (DataSourceException dse) {
			return readGridFromGeoTiff(file, getDefaultCRS());
		}
	}