Local Hint Resolve valid_access_implies: mem.

(* Specifications: *)
Theorem valid_access_valid_block:
forall m chunk b ofs,
valid_access m chunk b ofs Nonempty ->
valid_block m b.
Theorem valid_access_valid_block:
forall m chunk b ofs,
valid_access m chunk b ofs Nonempty ->
valid_block m b.