Description:
------------
This is very similar to https://bugs.php.net/bug.php?id=66084

When an empty node is within another node on the same line of a multi-line xml file, the empty node name gets parsed as an integer.

If the empty node gets moved to its own line, then it gets parsed correctly.

This previously worked in PHP 5.3, now fails in 5.4, 5.5 and 5.6.

Test script:
---------------
FAILS:

var_dump(simplexml_load_string('<a>
  <b><c/></b>
</a>'));

WORKS:

var_dump(simplexml_load_string('<a>
  <b>
    <c/>
  </b>
</a>'));

Expected result:
----------------
object(SimpleXMLElement)#1 (1) {
  ["b"]=>
  object(SimpleXMLElement)#3 (1) {
    ["c"]=>
    object(SimpleXMLElement)#2 (0) {
    }
  }
}

Actual result:
--------------
object(SimpleXMLElement)#1 (1) {
  ["b"]=>
  object(SimpleXMLElement)#3 (1) {
    [0]=>
    object(SimpleXMLElement)#2 (0) {
    }
  }
}