add_users_page not working for low priv users

[mattyrob]

This is an in-built WordPress function defined at line 271 of wp-admin/includes/plugin.php

It should add a submenu page to Users or Profile depending on the logged in users privileges.

It works for users.php but not for profile.php, the simple attached plugin demonstrates the bug.

[mattyrob]

As an additional point of interest, using the Admin Drop Down Menu written by Ozh also fixes this issue so I'm guessing that the problem must lie in the filtering of the menu array items.

[mattyrob]

Okay, after a lot of messing about debugging the code I think I have a fix in the attached diff.

[ryan]

(In [7618]) Fix add_users_page() when current user does not have edit_users cap. Props mattyrob. fixes #6621 for trunk

[ryan]

(In [7619]) Fix add_users_page() when current user does not have edit_users cap. Props mattyrob. fixes #6621 for 2.5