Description:
------------
With today's PHP 5.3 snapshot, include() on my Linux box leaks memory; 
I've noticed this because we're using long-running scripts with the 
PHP CLI (where Smarty's fetch/display methods call include()...). This 
doesn't happen with PHP 5.2.6.

I tested with an unchanged copy of php.ini-recommended and just 
'./configure' without any options, on Debian Linux 4.0, running in 
VMware Fusion on my Intel Mac.

Thanks for looking into this, and for the great work on PHP!

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

// Create an empty file
touch('empty.txt');

while (true)
{
    include('empty.txt');
    echo memory_get_usage() . "\n";
}

?>

Expected result:
----------------
No increase in memory usage.

Actual result:
--------------
Memory usage increases constantly, until PHP exits because the memory 
limit is exceeded.