XP_BZERO(&message_data, sizeof(IL_MessageData));
nsCRT::zero(&message_data, sizeof(IL_MessageData));
il_image_destroyed_notify(IL_ImageReq *image_req){    IL_MessageData message_data;        XP_BZERO(&message_data, sizeof(IL_MessageData));    message_data.image_instance = image_req;    XP_NotifyObservers(image_req->obs_list, IL_IMAGE_DESTROYED, &message_data);    /* Now destroy the observer list itself. */    XP_DisposeObserverList(image_req->obs_list);}