godaddy: Fix dubious response body check

It doesn't make sense to continue processing if the response body
can't be parsed.  Maybe GoDaddy returned 200 and there's a bug in the
body parsing logic, in which case the `bad` result should actually be
`good`.  But it's better to assume that the update wasn't saved, in
case the server returns 200 with a JSON object that semantically means
"failed to update".

ddclient.in

@@ -5776,9 +5776,10 @@ sub nic_godaddy_update {
             my $msg;
             $reply =~ s/^.*?\n\n//s;
             my $response = eval {decode_json($reply)};
-            if (!defined($response) && $code != "200") {
+            if (!defined($response)) {
                 $$status = "bad";
                 failed("%s.%s -- Unexpected or empty service response, cannot parse data.", $hostname, $zone);
+                next;
             } elsif (defined($response->{code})) {
                 info("%s.%s -- %s - %s.", $hostname, $zone, $response->{code}, $response->{message});
             }