extern int saver_ehandler (Display *dpy, XErrorEvent *error);
extern int BadWindow_ehandler (Display *dpy, XErrorEvent *error);
extern Bool window_exists_p (Display *dpy, Window window);
extern int saver_ehandler (Display *dpy, XErrorEvent *error);
extern int BadWindow_ehandler (Display *dpy, XErrorEvent *error);
extern Bool window_exists_p (Display *dpy, Window window);