Looks for contents.css in wrong location

When installing ckeditor in libraries/ instead of modules/ckeditor/, the ckeditor.module still thinks the editor's contents.css is located in the module directory.

Line 849, $module_full_path:

$css_files[] = $module_full_path .'/ckeditor/contents.css';

Should be $editor_path:

$css_files[] = $editor_path .'/ckeditor/contents.css';