fix crash on nil

Signed-off-by: Jeff Carr <jcarr@wit.com>

main.go

@@ -85,6 +85,9 @@ func lookupAAAA(hostname string) string {
 	// lookup the IP address from DNS
 	dnsRR := dnssecsocket.Dnstrace(hostname, "AAAA")
 	spew.Dump(dnsRR)
+	if (dnsRR == nil) {
+		return "BROKEN"
+	}
 	ipaddr := dns.Field(dnsRR, 1)
 	log.Println("ipaddr", ipaddr)
 	return ipaddr
@@ -122,11 +125,14 @@ func main() {
 	gui.Data.Width		= int(pbC.Width)
 	gui.Data.Height		= int(pbC.Height)
 
+	// use this to discover what the OS thinks it's hostname is
+	// seems to be cross platform (?)
 	hostname := fqdn.Get()
 	log.Println("fqdn.Get() = ", hostname)
 	gui.Data.Hostname	= hostname
-	// TODO: figure out the IPv6 address the right way
-	// probably dig <hostname> AAAA
+
+	// this is a recursive dig for the AAAA record
+	// TODO: check for dns hijacking
 	ipAAAA := lookupAAAA(hostname)
 	gui.Data.IPv6		= ipAAAA
 
@@ -368,7 +374,6 @@ func watchGUI() {
 		}
 		if (gui.Data.State == "CREATE") {
 			log.Println("\tTRIGGERING CREATE HERE")
-
 			event := pb.MakeAddVmEvent()
 			event.Username = gui.Data.Current.Username
 			event.Token    = gui.Data.Current.Token