Joomla SEF / SEO - extending OpenSEF

Warning: Invalid argument supplied for foreach() in
\administrator\components\com_sef\plugins\wbseo\wbseo.class.php on line 41

appears on new installations with empty jos_opensef_plugin_wbseo table,

fix: change to
if ($row) foreach($row as $k=>$v){
at row 40

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numerous notices eg. Notice: Undefined property:
JosOpenSEFAlias::$plugin_wbseo_titles_on in
C:\sokkit\site\dev_code\o\administrator\components\com_sef\includes\sef.bac
kend.php on line 793

appear when opened 'New Friendly URL' or just url without SEO fields
filled

quick fix: change = to =@ in all fragments like this
$value =@ (is_object( $tpl ) ? $tpl->data->$name : strval( $tpl ));