JSONtoChunk Snippet crashes if location is empty

[MrDigii]

If no location is set the JSONtoChunk Snippet crashed while trying to convert JSON to array.
Possible fix can be a guardian. Tested modification:

if (!$input) return "null";

$array = $modx->fromJSON($input);
if (count($array) > 0) {
    $chunk = $modx->getObject('modChunk', array('name' => $options));
    if ($chunk) {
        $output = $chunk->process($array);
    }
}
return $output;