3006 VERIFY[S,U,P] and ASSERT[S,U,P] frequently check if first argument is zero

@@ -2241,11 +2241,11 @@
                 sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE,
                     DMU_OT_NONE, 0, tx);
 
                 error = zap_add(os, MASTER_NODE_OBJ,
                     ZFS_SA_ATTRS, 8, 1, &sa_obj, tx);
-                ASSERT3U(error, ==, 0);
+                ASSERT0(error);
 
                 VERIFY(0 == sa_set_sa_object(os, sa_obj));
                 sa_register_update_callback(os, zfs_sa_upgrade);
         }