rem: handler->next = deathHandler;  deathHandler = handler;
add: if (!deathHandlers) deathHandlers = WMCreateBag(8);  WMPutInBag(deathHandlers, handler);
context: wAddDeathHandler(pid_t pid, WDeathHandler *callback, void *cdata){    DeathHandler *handler;        handler = malloc(sizeof(DeathHandler));    if (!handler)      return 0;        handler->pid = pid;    handler->callback = callback;    handler->client_data = cdata;        handler->next = deathHandler;            deathHandler = handler;    return handler;}