6659 nvlist_free(NULL) is a no-op

*** 686,696 ****
                  (void) topo_pgroup_create(chnode, &chan_pgroup, &err);
  
                  (void) topo_prop_set_string(chnode, PGNAME(CHAN), "channel",
                      TOPO_PROP_IMMUTABLE, i == 0 ? "A" : "B", &err);
          }
-         if (pfmri)
                  nvlist_free(pfmri);
  
          return (nerr == 0 ? 0 : -1);
  }
  
--- 686,695 ----