Path to fckeditor folder must be added to include_path for fckeditor_is_compatible_client()

In fckeditor.php(from fckeditor distribution) included file via next line:
include_once( 'fckeditor_phpX.php' )

But for correct work path to this file must be in include_path.
Else we have error on some enviroment(workdir set to server root) like "open_basedir restriction in effect... cannot include /fckeditor_phpX.php...)

Solution:
In fckeditor_is_compatible_client() temporary change include path, replace next line:

include $fckeditor_main_file;

To:
$include_path = get_include_path();
set_include_path(drupal_get_path('module', 'fckeditor') .'/fckeditor/' . PATH_SEPARATOR . $include_path);
include $fckeditor_main_file;
set_include_path($include_path);