6659 nvlist_free(NULL) is a no-op

*** 1768,1778 ****
          }
  
          r = SCF_SUCCESS;
  
  cleanup:
-         if (params)
                  nvlist_free(params);
          scf_pg_destroy(pg);
          scf_instance_destroy(i);
          scf_handle_destroy(h);
          free(pgname);
--- 1768,1777 ----