Description:
------------
If a SoapServer-Object is instantiated with the option SOAP_SINGLE_ELEMENT_ARRAYS (to automatically get an array if defined in the wsdl) together with SOAP_USE_XSI_ARRAY_TYPE (to allow array types instead of wsdl types), an request sent with an SOAPEnc:Array will be transformed to an array with a "deepness" of 2.

Reproduce code:
---------------
class SoapHandler {
	function getSomething($arguments) {
		print_r($arguments);
	}
}

/**
 * SoapServer
 */

$server = new SoapServer($wsdl,
	array(
		'uri' => $uri,
		'features' => SOAP_USE_XSI_ARRAY_TYPE + SOAP_SINGLE_ELEMENT_ARRAYS));
$server->setClass('SoapHandler');
$server->handle();

/**
 * request
 **/

<SOAP-ENV:Envelope SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
	<SOAP-ENV:Body>
		<ns4848:getSomething>
			<arguments xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="xsd:string[2]">
				<item xsi:type="xsd:string">String 1</item>
				<item xsi:type="xsd:string">String 2</item>
			</arguments>
		</ns4848:getRouteMiles>
	</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Expected result:
----------------
Array
(
    [0] => String 1
    [1] => String 2
)


Actual result:
--------------
Array
(
    [0] => Array
        (
            [0] => String 1
            [1] => String 2
        )

)