no need to allocate ini_ns_key

zend_container.h

@@ -39,9 +39,7 @@ public:
  ZEND_CONTAINER_INIT(bstr)
  ZEND_CONTAINER_INIT(bint)
  static std::string bnode_object_get_class_name(zval *object) {
- char *ini_ns_key = estrdup("bencode.namespace");
- zend_bool ini_ns = zend_ini_long(ini_ns_key, strlen(ini_ns_key), 0);
- efree(ini_ns_key);
+ zend_bool ini_ns = zend_ini_long((char *)"bencode.namespace", 17, 0);
  std::string class_name(ZSTR_VAL(Z_OBJ_P(object)->ce->name));
  if (ini_ns) {
   return class_name.substr(8);