The problem was that PACK_KEYS and MAX_ROWS clause in ALTER TABLE did not trigger
table reconstruction.
The fix is to rebuild a table if PACK_KEYS or MAX_ROWS are specified.


mysql-test/r/alter_table.result:
  test result
mysql-test/t/alter_table.test:
  test case
sql/sql_table.cc:
  The problem was that PACK_KEYS and MAX_ROWS clause in ALTER TABLE did not trigger
  table reconstruction.
  The fix is to rebuild a table if PACK_KEYS or MAX_ROWS are specified.