6659 nvlist_free(NULL) is a no-op

@@ -1768,11 +1768,10 @@
         }
 
         r = SCF_SUCCESS;
 
 cleanup:
-        if (params)
                 nvlist_free(params);
         scf_pg_destroy(pg);
         scf_instance_destroy(i);
         scf_handle_destroy(h);
         free(pgname);