[Plugin: Search By Category] Uninitialized variable $cat_id

In the current version 2.0.2 of the plugin, what is the value of $cat_id on about line 246:

if(!$only_cat){
    ...
    $settings = array('show_option_all' => $focus,
        ...
        'selected' => $cat_id,

In version 2.0.1 it looked like:

if(!$only_cat){
    $cat_id=$_GET['cat'];
    ...
    $settings = array('show_option_all' => $focus,
        ...
        'selected' => $cat_id,

FYI: version 2.0.1 works great, 2.0.2 does not work, sorry i can’t provide more details yet.

https://www.ads-software.com/extend/plugins/search-by-category/