Fix the problem that clean_canvas() can not clean canvas cleanly. - For some unknown reasons, cairo_paint() can not clean painted graphics cleanly. - Use cairo_rectangle() and cairo_fill() to replace cairo_paint().

#ifndef __MB_H_
#define __MB_H_

#include "mb_types.h"
#include "mb_redraw_man.h"
#include "mb_X_supp.h"
#include "mb_animate.h"
#include "mb_shapes.h"

#endif /* __MB_H_ */