rem: free(wwin->normal_hints);
add: XFree(wwin->normal_hints);
context: wWindowDestroy(WWindow *wwin){    int i;    WMRemoveNotificationObserver(wwin);        wwin->flags.destroyed = 1;    for (i = 0; i < MAX_WINDOW_SHORTCUTS; i++) {	if (!wwin->screen_ptr->shortcutWindows[i])	    continue;	WMRemoveFromBag(wwin->screen_ptr->shortcutWindows[i], wwin);	if (!WMGetBagItemCount(wwin->screen_ptr->shortcutWindows[i])) {	    WMFreeBag(wwin->screen_ptr->shortcutWindows[i]);	    wwin->screen_ptr->shortcutWindows[i] = NULL;	}    }    if (wwin->normal_hints)      free(wwin->normal_hints);        if (wwin->wm_hints)      XFree(wwin->wm_hints);        if (wwin->wm_instance)      XFree(wwin->wm_instance);    if (wwin->wm_class)      XFree(wwin->wm_class);    if (wwin->wm_gnustep_attr)      free(wwin->wm_gnustep_attr);    if (wwin->cmap_windows)      XFree(wwin->cmap_windows);    XDeleteContext(dpy, wwin->client_win, wWinContext);    if (wwin->frame)	wFrameWindowDestroy(wwin->frame);    if (wwin->icon) {	RemoveFromStackList(wwin->icon->core);        wIconDestroy(wwin->icon);        if (wPreferences.auto_arrange_icons)            wArrangeIcons(wwin->screen_ptr, True);    }    wrelease(wwin);}