fix error

Author: xiazhvera

source/client.c

@@ -1884,7 +1884,7 @@ static enum aws_mqtt_client_request_state s_subscribe_send(uint16_t packet_id, b
         return AWS_MQTT_CLIENT_REQUEST_ERROR;
     }
 
-    AWS_VARIABLE_LENGTH_ARRAY(uint8_t, transaction_buf, num_topics *aws_mqtt_topic_tree_action_size);
+    AWS_VARIABLE_LENGTH_ARRAY(uint8_t, transaction_buf, num_topics * aws_mqtt_topic_tree_action_size);
     struct aws_array_list transaction;
     aws_array_list_init_static(&transaction, transaction_buf, num_topics, aws_mqtt_topic_tree_action_size);
 
@@ -2677,7 +2677,7 @@ static enum aws_mqtt_client_request_state s_unsubscribe_send(
 
     static const size_t num_topics = 1;
 
-    AWS_VARIABLE_LENGTH_ARRAY(uint8_t, transaction_buf, num_topics *aws_mqtt_topic_tree_action_size);
+    AWS_VARIABLE_LENGTH_ARRAY(uint8_t, transaction_buf, num_topics * aws_mqtt_topic_tree_action_size);
     struct aws_array_list transaction;
     aws_array_list_init_static(&transaction, transaction_buf, num_topics, aws_mqtt_topic_tree_action_size);
 

source/mqtt_iot_sdk_metrics.c

@@ -113,7 +113,7 @@ int aws_mqtt_append_sdk_metrics_to_username(
     }
 
     if (aws_mqtt_validate_iot_sdk_metrics(metrics)) {
-        return aws_raise_error(AWS_ERROR_INVALID_ARGUMENT);
+        return AWS_OP_ERR;
     }
 
     int result = AWS_OP_ERR;