[Plugin: Wiki] Breaks role capabilities

File: wiki.php
Class: Wiki
Method: role_has_cap
Line: 1149

At line 90 (Wiki class constructor), this method is registered as a “role_has_cap” filter. The problem is, the filter returns nothing. As a result, all role capabilities are set to “false”.

function role_has_cap($capabilities, $cap, $name) {
	// nothing to do
    }

http://ww.wp.xz.cn/extend/plugins/wordpress-wiki-plugin/