Undefined variable errors

Hello there

We are using 3.0.0 version of the plugin, and we are getting a lot of these errors

NOTICE: PHP message: PHP Notice:  Undefined variable: toolObject in wp-content/plugins/addthis-all/backend/AddThisPlugin.php on line 1433

NOTICE: PHP message: PHP Notice:  Trying to get property of non-object in wp-content/plugins/addthis-all/backend/AddThisPlugin.php on line 1433

Having a look at the file, we confirm the variable isn’t defined neither in the method nor in the class.

Looking at the original code, we realize that the shortCode might come from the foreach variable rather than the object property

foreach ($shortCodes as $shortCode => $callback) {
    if ($this->shortcodeExists($toolObject->shortCode)) {
        continue;
    }
    add_shortcode($shortCode, $callback);
}

We modified the code as follows

foreach ($shortCodes as $shortCode => $callback) {
    if ($this->shortcodeExists($shortCode)) {
        continue;
    }
    add_shortcode($shortCode, $callback);
}

There are no more errors related to the undefined variable, but does it makes sense to you?

PHP version is 5.4.16 and is run using FPM

Thank you in advance