[9fans] setmalloctag()

[erik quanstrom]

shouldn't the sig be

        extern  void    setmalloctag(void*, void*);
or
        extern  void    setmalloctag(void*, uintptr);
(matching ndbsetrealloctag and convention) not
        extern  void    setmalloctag(void*, ulong);

since on a mythical 64-bit machine, ulong is 32bits but
addresses are 64 bits?

- erik