TLR_TSK_CREATE returns invalid task handle if created task has no name

TLR_TSK_CREATE is supposed to return the task handle of the created task. This does not work under rcX if the task has no name (pszTskName = NULL). If a user creates an unnamed task rX_SysIdentifyTask (which is used to get the task handle) will return the handle of the task calling TLR_TSK_CREATE instead of the newly created task.