no practical consequence on 32-bit systems. old prototype was
int profil(char *, int, int, int), and new one is int profile(char *,
size_t, u_long, u_int). the size_t is the size of the buffer,
and the u_long is the 'starting offset'. (I changed the last int
to u_int, because it's treated as a u_int everywhere, and isn't
logically a signed value.)
