mysql-test/r/partition_range.result:
  Changed test cases
mysql-test/t/partition_range.test:
  Changed test cases
sql/partition_info.cc:
  Changes to resue signed integer code for unsigned integer partition functions
  Basic idea is to store value - 0x8000000000000000 in list_array and range_int_array
  and also perform this subtraction before applying get_partition_id_range and so
  forth.
sql/sql_partition.cc:
  Changes to resue signed integer code for unsigned integer partition functions
  Basic idea is to store value - 0x8000000000000000 in list_array and range_int_array
  and also perform this subtraction before applying get_partition_id_range and so
  forth.