cache: check if finalIps length is 0 and not less than 0

Slice's length will never be below 0.

Signed-off-by: Miguel Ángel Jimeno <miguelangel4b@gmail.com>

common/cache/dialer.go

@@ -39,7 +39,7 @@ func NewDialer(options Options) (DialerFunc, error) {
 				finalIps = append(finalIps, ip)
 			}
 		}
-		if err != nil || len(finalIps) < 0 {
+		if err != nil || len(finalIps) == 0 {
 			return nil, &NoAddressFoundError{}
 		} // Dial to the IPs finally.
 		for _, ip := range ips {