Remove language prefix from $_REQUEST['q'], just like $_GET['q']

due to the bug reported from module globalredirect, http://drupal.org/node/216271, i think we should removed the language prefix in $_REQUEST['q'] during languge init. in file language.inc,

change:

// Search prefix within enabled languages.
foreach ($languages as $language) {
if (!empty($language->prefix) && $language->prefix == $prefix) {
// Rebuild $GET['q'] with the language removed.
$_GET['q'] = implode('/', $args);
return $language;
}
}

to:

// Search prefix within enabled languages.
foreach ($languages as $language) {
if (!empty($language->prefix) && $language->prefix == $prefix) {
// Rebuild $GET['q'] with the language removed.
$_REQUEST['q'] = $_GET['q'] = implode('/', $args);
return $language;
}
}

because we don't need the language prefix after language_initialize(), it's set to global $language.