GeneralDirectPosition changes for revisions 30919:30920

This commits applies a change which was done in GeoAPI. This is a trivial change which can not be done in any other way, since keeping the old method name causes a compilation error.

Command line:

svn diff --extensions "--unified --ignore-space-change --ignore-all-space --ignore-eol-style" -r30919:30920 https://svn.osgeo.org/geotools/trunk/modules/library/referencing/src/main/java/org/geotools/geometry/GeneralDirectPosition.java

 * @since 2.2
 */
public GeneralDirectPosition(final DirectPosition point) {
    ordinates = point.getCoordinates(); // Should already be cloned.
    crs = point.getCoordinateReferenceSystem();
}

 * @since 2.2
 */
public GeneralDirectPosition(final DirectPosition point) {
    ordinates = point.getCoordinate(); // Should already be cloned.
    crs = point.getCoordinateReferenceSystem();
}