patch tsoome-feedback

*** 72,82 ****
  
  /*ARGSUSED*/
  static int
  set_error(topo_hdl_t *thp, int err, int *errp, char *method, nvlist_t *nvlp)
  {
-         if (nvlp != NULL)
                  nvlist_free(nvlp);
  
          topo_dprintf(thp, TOPO_DBG_ERR, "%s failed: %s\n", method,
              topo_strerror(err));
  
--- 72,81 ----
*** 86,96 ****
  
  /*ARGSUSED*/
  static nvlist_t *
  set_nverror(topo_hdl_t *thp, int err, int *errp, char *method, nvlist_t *nvlp)
  {
-         if (nvlp != NULL)
                  nvlist_free(nvlp);
  
          topo_dprintf(thp, TOPO_DBG_ERR, "%s failed: %s\n", method,
              topo_strerror(err));
  
--- 85,94 ----
*** 591,601 ****
              TOPO_METH_PROP_SET_VERSION, in, &out, err);
  
          nvlist_free(in);
  
          /* no return values */
-         if (out != NULL)
                  nvlist_free(out);
  
          if (rv)
                  return (-1);
  
--- 589,598 ----