Check arguments length before reading

fix

```
panic: runtime error: index out of range [1] with length 1

goroutine 1 [running]:
main.getQuestion()
        /build/dnslookup/parts/dnslookup/build/main.go:239 +0x147
main.main()
        /build/dnslookup/parts/dnslookup/build/main.go:44 +0x145
```

Revert "Check arguments length before reading"

This reverts commit 4bc0a24.

Update main.go

main.go

@@ -41,7 +41,6 @@ func main() {
 	do := os.Getenv("DNSSEC") == "1"
 	subnetOpt := getSubnet()
 	ednsOpt := getEDNSOpt()
-	question := getQuestion()
 
 	if verbose {
 		log.SetLevel(log.DEBUG)
@@ -72,6 +71,8 @@ func main() {
 		os.Exit(1)
 	}
 
+	question := getQuestion()
+
 	if timeoutStr != "" {
 		i, err := strconv.Atoi(timeoutStr)
 		if err != nil {