* variable.c, threads.c, struct.c, stackchk.c, smob.c, root.c,

* variable.c, threads.c, struct.c, stackchk.c, smob.c, root.c,
print.c, ports.c, mallocs.c, hooks.c, hashtab.c, fports.c,
guardians.c, filesys.c, coop-pthreads.c, continuations.c: Use
scm_uintprint to print unsigned integers, raw heap words, and
adresses, using a cast to scm_t_bits to turn pointers into
integers.