When creating a new partition, a bogus memory allocation problem was
reported.


mysql-test/r/partition.result:
  Add new results
mysql-test/t/partition.test:
  Add new regression test
sql/sql_table.cc:
  Fix inverted tests that caused mysql_copy_key_list() to not work at all,
  remove a forward declaration for a function that does not exist, and fix
  a debug message.