Description:
------------
This bug is pretty similar to Bug #66084 :
simplexml_load_string() incorrectly interprets some XML strings. For specific inputs with empty nodes, node names are converted to integers.

Original bug was fixed, but the same bug appears on a slightly different XML string '<a><c><inner/></c><c><inner>ddd</inner></c></a>'.

Test script:
---------------
print_r(simplexml_load_string('<a><c><inner/></c><c><inner>ddd</inner></c></a>'));

Expected result:
----------------
SimpleXMLElement Object
(
    [c] => Array
        (
            [0] => SimpleXMLElement Object
                (
                    [inner] => SimpleXMLElement Object
                        (
                        )

                )

            [1] => SimpleXMLElement Object
                (
                    [inner] => dd
                )

        )

)

Actual result:
--------------
SimpleXMLElement Object
(
    [c] => Array
        (
            [0] => SimpleXMLElement Object
                (
                    [0] => SimpleXMLElement Object
                        (
                        )

                )

            [1] => SimpleXMLElement Object
                (
                    [inner] => ddd
                )

        )

)