Description:
------------
base64_decode fails with only one char encoded in base64,

this bug only occurs on Mac OS X (10.7 and 10.8, only versions I currently have 
available)

bug is in PHP in Mac OS X and in actual version from php.net (5.4.6)

I tryied compile with gcc & clang.

Test script:
---------------
<?php 
echo base64_decode(base64_encode("A"))."\n";
?>


Expected result:
----------------
<?php echo base64_decode(base64_encode("A"))."\n"; ?>

must returns "A"

<?php echo base64_decode(base64_encode("C"))."\n"; ?>

must returns "C"


Actual result:
--------------
<?php echo base64_decode(base64_encode("A"))."\n"; ?>

returns "AD"

<?php echo base64_decode(base64_encode("C"))."\n"; ?>

returns "CD"