Description:
------------
This little code snippet leaks..

Reproduce code:
---------------
<?php
class foo {
    const cons = 10;
}

class bar extends foo {
}

$foo = new ReflectionClass("foo");
$foo->getConstant("cons");


Actual result:
--------------
==73146== 16 bytes in 1 blocks are definitely lost in loss 
record 1 of 2
==73146==    at 0x3C03C18B: malloc 
(in /usr/local/lib/valgrind/vgpreload_memcheck.so)
==73146==    by 0x81A4EAF: _emalloc (zend_alloc.c:1628)
==73146==    by 0x81DBFF3: zend_do_fcall_common_helper_SPEC 
(zend_vm_execute.h:182)
==73146==    by 0x81DCAD0: 
ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER (zend_vm_execute.h:322)
==73146==    by 0x81DBD01: execute (zend_vm_execute.h:92)
==73146==    by 0x81BE198: zend_execute_scripts 
(zend.c:1095)
==73146==    by 0x8178454: php_execute_script (main.c:1759)
==73146==    by 0x82236C0: main (php_cli.c:1102)