Description:
------------
When a flatfile database is opened in 'c' mode, fetching an entry
after having replaced it returns the old value. Note, that the
return value of dba_replace() is correct, i.e. the entry has
indeed been updated.

This issue occurs only on Windows, but not on Linux.



Test script:
---------------
<?php

$filename = __DIR__ . DIRECTORY_SEPARATOR . 'test.txt';

if (file_exists($filename)) unlink($filename);

$db = dba_open($filename, 'c', 'flatfile');
dba_insert('foo', 'bar', $db);
var_dump(dba_replace('foo', 'baz', $db));
var_dump(dba_fetch('foo', $db));
dba_close($db);


Expected result:
----------------
bool(true)
string(3) "baz"


Actual result:
--------------
bool(true)
string(3) "bar"