Description:
------------
when installing php5 i got an error with PEAR install


Reproduce code:
---------------
in file install-pear-nozlib.phar

                if (self::$_manifest[$this->_archiveName][$path][3] != sprintf("
%u", crc32($data))) {
                    return array("Not valid internal .phar file (checksum error)
");
                }


Expected result:
----------------
install PEAR
crc32 return int32 on 64bits architecture

Actual result:
--------------
gmake install
...
Installing PEAR environment:      /usr/pkg/lib/php/

Fatal error: Not valid internal .phar file (checksum error) in /pkg/obj/lang/php
5/work/php-5.2.1/pear/install-pear-nozlib.phar on line 411
gmake[1]: *** [install-pear-installer] Error 255