Cannot disable list in blockque

[Piotr Jasiun]

1. Open browser (tested with Chrome and IE11).
2. Open "Replace Textarea Elements by Class Name" sample (samples/replacebyclass.html).
3. Set this content in editor:

   <ol>
   	<li>aa
   	<blockquote>
   	<ol>
   		<li>bb</li>
   		<li>cc</li>
   	</ol>
   	</blockquote>
   	</li>
   	<li>dd</li>
   </ol>
   

4. Switch to WYSIWYG mode and select [bb cc].
5. Press "Insert/Remove numbered list" button.

List is not removed and in console you should see:

Uncaught TypeError: Cannot set property 'indent' of undefined 

[Jakub Ś]

Problem can be reproduced from CKEditor 3.0.2 in all browsers.

Error is thrown in: URI: /plugins/list/plugin.js
Line: 454
Code: listArray[ listIndex ].indent = -1;
Message: listArray[listIndex] is undefined