transfer this new task. If 0, then it cannot be transfered with
MSG_task_get() and MSG_task_put(). This value has to be >=0.
* \param data a pointer to any data may want to attach to the new
transfer this new task. If 0, then it cannot be transfered with
MSG_task_get() and MSG_task_put(). This value has to be >=0.
* \param data a pointer to any data may want to attach to the new