-- scheme48vm-prelude.h
++ scheme48vm-prelude.h
#include "c-mods.h"
#include "write-barrier.h"
#define SMALL_MULTIPLY(x,y) ((x) * (y))
#define SMALL_MULTIPLY(x,y) ((long)((unsigned long)(x) * (unsigned long)(y)))
#define NO_ERRORS 0 /* extension to errno.h */