rem: int wGetHeadForWindow(WWindow *wwin)
add: wGetHeadForWindow(WWindow *wwin)
context: int wGetHeadForWindow(WWindow *wwin){    WMRect rect;    rect.pos.x = wwin->frame_x;    rect.pos.y = wwin->frame_y;    rect.size.width = wwin->frame->core->width;    rect.size.height = wwin->frame->core->height;    return wGetHeadForRect(wwin->screen_ptr, rect);}