return _pr_CopyLowBits(buf, size,  &c, sizeof(c));
return _pr_CopyLowBits((void *)buf, size,  &c, sizeof(c));
extern PRSize _PR_MD_GetRandomNoise( buf, size ){    uint32 c = TickCount();    return _pr_CopyLowBits(buf, size,  &c, sizeof(c));}