Token access and token request called using Menu API was not using the function arguments correctly

A typical call to a token_request would be as follows:
http://www.example.com/webservice/token_request?oauth_version=1.0&oauth_...

The definition of _oauth_token_request() is:
function _oauth_token_request($timestamp, $nonce, $consumer_key, $consumer_secret)
and _oauth_token_request() is directly called from the menu system through this snippet:

$items['webservice/token_request'] = array(
    'access callback'   => TRUE,
    'file'              => 'oauth.inc',
    'page callback'     => '_oauth_token_request',
    'type'              => MENU_CALLBACK,
  );

This means that the example call above with explicit parameters won't work, spitting a lot of 'missing parameter' errors. In fact only arguments in the directory-like form (e.g.: /webservice/token_request/arg1/arg2/arg3) will be passed to the callback.

As far as I understand, the current function implementation is written to work with the webservices module (_oauth_token_request is mentioned in hook_webservices_info() implementation too). So there must be some kind of conflict in implementation.

In this patch I'm implementing a quick and dirty approach using a tunnel function (_oauth_direct_token_request) referenced in the hook_menu that maps GET parameters correctly.
This fixes the missing parameter errors but still keeps outputting these errors which leave me a bit more clueless:

    * warning: array_fill() [function.array-fill]: Number of elements must be positive in /var/www/drupal-6.6/includes/database.inc on line 241.
    * warning: implode() [function.implode]: Invalid arguments passed in /var/www/drupal-6.6/includes/database.inc on line 241.
    * warning: array_keys() [function.array-keys]: The first argument should be an array in /var/www/drupal-6.6/modules/user/user.module on line 500.
    * user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 query: SELECT p.perm FROM role r INNER JOIN permission p ON p.rid = r.rid WHERE r.rid IN () in /var/www/drupal-6.6/modules/user/user.module on line 500.
    * warning: array_keys() [function.array-keys]: The first argument should be an array in /var/www/drupal-6.6/modules/block/block.module on line 406.
    * warning: array_fill() [function.array-fill]: Number of elements must be positive in /var/www/drupal-6.6/includes/database.inc on line 241.
    * warning: implode() [function.implode]: Invalid arguments passed in /var/www/drupal-6.6/includes/database.inc on line 241.
    * warning: array_merge() [function.array-merge]: Argument #2 is not an array in /var/www/drupal-6.6/modules/block/block.module on line 407.
    * user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') OR r.rid IS NULL) ORDER BY b.region, b.weight, b.module' at line 1 query: SELECT DISTINCT b.* FROM blocks b LEFT JOIN blocks_roles r ON b.module = r.module AND b.delta = r.delta WHERE b.theme = '' AND b.status = 1 AND (r.rid IN () OR r.rid IS NULL) ORDER BY b.region, b.weight, b.module in /var/www/drupal-6.6/modules/block/block.module on line 407.