Description:
------------
While running a soap client in wsdl mode, if the response of a call contains an 
element which is 
an extension, and it contains itself, an infinite loop occurs in resulting in a 
segmentation fault. The provided patch is against 5.3.6, does not produce the 
expected results (but does not segfault), and causes other tests to fail, but it 
identifies where the problem is (to_zval_object_ex). I've confirmed that this also 
occurs in previous versions.

Test script:
---------------
Test script: http://soapbug.privatepaste.com/700d21fc7f
WSDL: http://soapbug.privatepaste.com/4d7e882d61
XSD: http://soapbug.privatepaste.com/43f7a3e274

Expected result:
----------------
object(stdClass)#%d (2) {
  ["accountId"]=>
  int(1234)
  ["parent"]=>
  *RECURSION*
  }
}


Actual result:
--------------
Segmentation fault