Description:
------------
When function is_readable is run it leaves an open handle in the httpd process.

Additional information:
-----------------------
Memory leak confirmed for the following configurations:
PHP vc9 5.3.15, thread safe version + Apache Httpd 2.4.2 + Win XP SP3 
PHP vc9 5.4.5,  thread safe version + Apache Httpd 2.4.2 + Win XP SP3 

PHP vc9 5.4.5 tested on WAMP stacks:
------------------------------------
XAMPP USB Lite 1.8.0        (Windows XP SP3)
Uniform Server 8.5.8-Coral  (Windows XP SP3)

For details see:
http://forum.uniformserver.com/index.php?showtopic=2627&hl=
Windows 7 SP1 and Windows Server 2008 R2 (both is 64-bit OS)

The above memory leak makes running PHP on Windows production server impractical.


Test script:
---------------
for($i=0; $i<100;$i++) {
  is_readable("c:\\temp");
}

NOTE: the folder/file must exist for the leak to happen.

Expected result:
----------------
No leaked handles

Actual result:
--------------
100 leaked handles