Description:
------------
When a binary file is inserted in a blob field the content is saved partially corrupting the file. Tested in a 32bit OS and it works fine but the file is not saved correctly when the platform is 64bit.

PHP: tested in versions 5.4.45, 5.5.30 and 5.6.16.
CSDK: 4.10.FC6DE

Test script:
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// $con is a valid PDO_INFORMIX connection

$base64BlobFile = 'UEsDBBQAAAAIABiIJEj+Q0o8DwAAABIAAAAJABwAZmlsZTEudHh0VVQJAA'
    . 'Mvl4pWaJeKVnV4CwABBOgDAAAE6AMAAMvJzEs15MoBkkZg0pgLAFBLAQIeAxQAAAAIABiI'
    . 'JEj+Q0o8DwAAABIAAAAJABgAAAAAAAEAAAC0gQAAAABmaWxlMS50eHRVVAUAAy+XilZ1eA'
    . 'sAAQToAwAABOgDAABQSwUGAAAAAAEAAQBPAAAAUgAAAAAA';

$blobFile = '/tmp/file1.zip';

file_put_contents($blobFile, base64_decode($base64BlobFile));

try {
    $con->exec('DROP TABLE blob_test');
}
catch (Exception $e) {}

$con->exec('CREATE TABLE blob_test (blob_column BLOB)');

$fh = fopen($blobFile, 'rb');

$stmt = $con->prepare('INSERT INTO blob_test (blob_column) VALUES (?)');
$stmt->bindParam(1, $fh, PDO::PARAM_LOB);
$stmt->execute();

$stmt = $con->prepare('SELECT FIRST 1 blob_column FROM blob_test');
$stmt->bindColumn(1, $blob, PDO::PARAM_LOB);
$stmt->execute();
$stmt->fetch(PDO::FETCH_BOUND);

fseek($fh, 0);
$expectedContent = stream_get_contents($fh);
$actualContent = stream_get_contents($blob);

print $expectedContent == $actualContent ? "Test ok\n" : "Test fail\n";

Expected result:
----------------
The file should be inserted correctly.

Actual result:
--------------
The inserted file is corrupted.