Revert changeset #88c8c874f4b8. #88c8c874f4b8 try to fix crashing, but it blame to wrong code. If you look into runtime stack of xnjsmb_coord_remove(), you will find self argument is already wrong. It is in an invalid address.

// -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
// vim: sw=4:ts=8:sts=4
#ifndef __X_SUPP_H_
#define __X_SUPP_H_

#include <X11/Xlib.h>

typedef Window MB_WINDOW;
typedef Display *MB_DISPLAY;

#endif