test "length" first (otherwise when "length" is 0, the *from invalid access still triggers a Valgrind warning).
I wrote to the Valgrind authors in case this is something fixable in Valgrind (normally the
decision to issue a warning is based on the simulated CPU condition code, which should not be undefined here).


BUILD/compile-pentium64-valgrind-max:
  putting this script in sync with compile-pentium-valgrind-max, otherwise we didn't have the federated engine compiled in.
mysql-test/r/read_only.result:
  result update
sql/field.cc:
  To avoid a Valgrind warning running the type_bit test: test "length" first (otherwise when "length" is 0, the *from invalid access still triggers a Valgrind warning).