No subject

failed to return a value; should return true to continue hook processing 
or false to abort.
Backtrace:
#0 E:\wamp\www\Wiki\includes\Wiki.php(502): wfRunHooks('CustomEditor', 
Array)
#1 E:\wamp\www\Wiki\includes\Wiki.php(63): 
MediaWiki->performAction(Object(OutputPage), Object(Article), 
Object(Title), Object(User), Object(WebRequest))
#2 E:\wamp\www\Wiki\index.php(116): MediaWiki->initialize(Object(Title), 
Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#3 {main}
Any ideas anyone ?

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