fixed json-rpc debug log outputs

* moved them up a bit to also log something in case of an error

see #482

Author: Bernhard B

Diff for: src/client/jsonrpc2.go

@@ -121,13 +121,13 @@ func (r *JsonRpc2Client) getRaw(command string, account *string, args interface{
 	resp = <-responseChan
 	delete(r.receivedResponsesById, u.String())
 
+	log.Debug("json-rpc command response message: ", string(resp.Result))
+	log.Debug("json-rpc response error: ", string(resp.Err.Message))
+
 	if resp.Err.Code != 0 {
 		return "", errors.New(resp.Err.Message)
 	}
 
-	log.Debug("json-rpc command response message: ", string(resp.Result))
-	log.Debug("json-rpc response error: ", string(resp.Err.Message))
-
 	return string(resp.Result), nil
 }