简化检查是否有其他窗口管理器正在运行的实现

src/xcb/xcb.c

@@ -31,16 +31,10 @@ bool has_other_wm_running(void) {
   xcb_screen_iterator_t iter = xcb_setup_roots_iterator(setup);
   screen = iter.data;
   uint32_t mask = XCB_CW_EVENT_MASK;
-  xcb_params_cw_t params = {
-    .event_mask = XCB_EVENT_MASK_LEAVE_WINDOW | XCB_EVENT_MASK_ENTER_WINDOW |
-                  XCB_EVENT_MASK_POINTER_MOTION |
-                  XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
-                  XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY,
-  };
+  xcb_params_cw_t params = {.event_mask = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT};
   xcb_void_cookie_t cookie =
     xcb_aux_change_window_attributes_checked(conn, screen->root, mask, &params);
-  xcb_generic_error_t *error = xcb_request_check(conn, cookie);
-  if (error) {
+  if (xcb_request_check(conn, cookie)) {
     xcb_disconnect(conn);
     return true;
   }