Remove value requirement for park()'s 'topdomain' argument

Case 51116: The $topdomain arguement for API2 Park::park, technically,
is an optional argument.  This change alters the requirment for the helper
method, park(), such that the caller does not have specific it (which will
cause the parked domain to be done against the primary domain of the
$username's account).

CHANGELOG.txt

@@ -1,5 +1,8 @@
 CHANGELOG.txt for xmlapi.php
 
+ 1.0.11:
+ - [Feature]: Remove value requirement for park()'s 'topdomain' argument
+
  1.0.10:
  - github#1 - [Bugfix]: setresellerpackagelimits() does not properly prepare 
     input arguments for query (Case 51076)

xmlapi.php

@@ -29,11 +29,15 @@
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
-* Version: 1.0.10
-* Last updated: 27 June 2011
+* Version: 1.0.11
+* Last updated: 29 June 2011
 *
 * Changes
 * 
+* 1.0.11:
+* [Feature]: Remove value requirement for park()'s 'topdomain' argument 
+*  (Case 51116)
+* 
 * 1.0.10:
 * github#1 - [Bugfix]: setresellerpackagelimits() does not properly prepare 
 *  input arguments for query (Case 51076)
@@ -86,7 +90,7 @@
 *
 * @copyright 2011 cPanel, Inc
 * @license http://sdk.cpanel.net/license/bsd.html
-* @version 1.0.10
+* @version 1.0.11
 * @link http://twiki.cpanel.net/twiki/bin/view/AllDocumentation/AutomationIntegration/XmlApi
 * @since File available since release 0.1
 **/
@@ -114,7 +118,7 @@
 * @package xmlapi
 * @copyright 2011 cPanel, Inc.
 * @license http://sdk.cpanel.net/license/bsd.html
-* @version Release: 1.0.10
+* @version Release: 1.0.11
 * @link http://twiki.cpanel.net/twiki/bin/view/AllDocumentation/AutomationIntegration/XmlApi
 * @since Class available since release 0.1
 **/
@@ -2119,12 +2123,14 @@ public function addpop($username, $args) {
 	// This API function displays a list of all parked domains for a specific user.
 	public function park($username, $newdomain, $topdomain) {
 		$args = array();
-		if ( (!isset($username)) && (!isset($newdomain)) && (!isset($topdomain)) ) {
-			error_log("park requires that a username, new domain and topdomain are passed to it");
+		if ( (!isset($username)) && (!isset($newdomain)) ) {
+			error_log("park requires that a username and new domain are passed to it");
 			return false;
 		}
 		$args['domain'] = $newdomain;
-		$args['topdomain'] = $topdomain;
+		if ($topdomain) {
+		    $args['topdomain'] = $topdomain;   
+		}
 		return $this->api2_query($username, 'Park', 'park', $args);
 	}