Description:
------------
When rounding a small negative number, the function returns a negative zero. I suspect this has something to do with computing precision, so I suppose that the reason is not really a bug. I've seen the bug report at #31870 and I understand the answer. Strange thing is however that prior to 5.2.3 the result actually was float(0).

Reproduce code:
---------------
<?php
  var_dump( round(-0.26) );
?>

Expected result:
----------------
float(0)

Actual result:
--------------
PHP 4.3.10:
float(0)

PHP 4.4.6:
float(0)

PHP 5.1.6:
float(0)

PHP 5.2.3:
float(-0)