Description:
------------
Each call to strtotime() leaks about 1 kilobyte of memory.

This happens with 5.2.8 and 5.3.0a3, 5.2.6 does not have this problem.

Reproduce code:
---------------
<?

$test = "19 Dec 2008 23:30:12";

for ($i = 0; $i < 1000000; $i++) strtotime($test);

?>


Actual result:
--------------
with 5.2.8 php uses more than 1 gb of memory at the end of script execution.