refresh_presel_feebacks_in(d->root, d, m);
restack_presel_feedback(d);
for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
+ if (n->client == NULL) {
+ continue;
+ }
uint32_t values[] = {CLIENT_EVENT_MASK | (focus_follows_pointer ? XCB_EVENT_MASK_ENTER_WINDOW : 0)};
xcb_change_window_attributes(dpy, n->id, XCB_CW_EVENT_MASK, values);
}