fix

server/server.go

@@ -63,6 +63,7 @@ func NewServer(cfg *ServerConfig) (s *Server, err error) {
 		s.cfg.canonicalNameservers[i] = dns.Fqdn(s.cfg.canonicalNameservers[i])
 	}
 
+	if s.cfg.VanityIPs != "" {
 		vanityIPs := strings.Split(s.cfg.VanityIPs, ",")
 		for _, ips := range vanityIPs {
 			ip := net.ParseIP(ips)
@@ -71,6 +72,7 @@ func NewServer(cfg *ServerConfig) (s *Server, err error) {
 			}
 			s.cfg.vanityIPs = append(s.cfg.vanityIPs, ip)
 		}
+	}
 
 	s.namecoinConn = namecoin.Conn{
 		Username: cfg.NamecoinRPCUsername,