DNSCheckValidation line 202 code error

Hello, On line 202 -> if (empty($dnsRecord['target']) || $dnsRecord['target'] === '.') {

if record target = 0, empty ->true.

Wouldn't it be better with : if ((array_key_exists('target',$dnsRecord) && $dnsRecord['target'] == null) || $dnsRecord['target'] === '.') {

?

Thanks Phil