Description:
------------
The change for DVAL_TO_LVAL macro in 5.0.2 breaks some of my code that worked in earlier versions.  While it appears that it was relying on undefined behaviour, it allowed for example  a direct port of Tiny Encryption Algorithm's reference C code for PHP to work.

(http://en.wikipedia.org/wiki/Tiny_Encryption_Algorithm)

Reproduce code:
---------------
    function tea_encrypt($cycle, $key)
    {
      $a = $cycle[0];
      $b = $cycle[1];
      $sum = 0;
      $delta = (int)0x9e3779b9;
      for($i=0; $i<32; $i++)
      {
        $sum = (int)($sum + $delta);
        $a += (($b << 4) + $key[1]) ^ ($b + $sum) ^ (($b >> 5) + $key[2]);
        $b += (($a << 4) + $key[3]) ^ ($a + $sum) ^ (($a >> 5) + $key[4]);
      }
      return array($a, $b);
    }
    $result = tea_encrypt(array(123456, 987654), array(0, 1, 2, 3, 4));
    var_dump(unpack("H*", pack("V*", $result[0], $result[1])));


Expected result:
----------------
PHP versions prior to 5.0.2:
~> php -q tea.php                  
array(1) {
  [1]=>
  string(16) "8f695fc4e6d3c507"
}


Actual result:
--------------
~> ./php-5.0.2/sapi/cli/php -q tea.php
array(1) {
  [1]=>
  string(16) "ffffff7f00000080"
}