* Produce right results for conditions that were transformed to "(partitioning_range) AND
  (list_of_subpartitioning_ranges)": make each partition id set iterator auto-reset itself
  after it has returned all partition ids in the sequence 
* Fix "Range mapping" and "Range mapping" partitioning interval analysis functions to 
  correctly deal with NULL values. 

into  rurik.mysql.com:/home/igor/mysql-5.1

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new

into  mysql.com:/home/psergey/mysql-5.1-bug18659-pre

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new

into  rurik.mysql.com:/home/igor/dev/mysql-5.1-0

into  rurik.mysql.com:/home/igor/dev/mysql-5.1-0

obtain partition number, call partition_info->get_part_partition_id() when
the table has subpartitions, and get_partition_id() otherwise. (The bug
was that we were always doing the latter)

- move slock bitmask to separate hash list, object living only during query

into mysql.com:C:/cygwin/home/mysqldev/my/mysql-5.1-new

into  mysql.com:/usr_rh9/home/elkin.rh9/MySQL/BARE/mysql-5.1-new

into  c-4908e253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug13520

into  rurik.mysql.com:/home/igor/dev/mysql-5.1-0

into  mysql.com:/home/alexi/innodb/mysql-5.1-merged

Results changed after the bug fix.

into  c-520ae253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug13520

Multiple equalities were not adjusted after reading constant tables.
It resulted in neglecting good index based methods that could be
used to access of other tables.

into  mysql.com:/home/alexi/innodb/mysql-5.1-merged

into  mysql.com:/home/alexi/innodb/mysql-5.1-merged

 Fixed BUG#15650: DELETE with LEFT JOIN crashes server
 with innodb_locks_unsafe_for_binlog.
 Fixed compilation problem with non-C99 compilers
 in btr0sea.c

into mysql.com:/home/psergey/mysql-5.1-bug18025-r2

into  linux.site:/home/reggie/work/mysql-5.1-bug17631

moved several functions from sql_partition to be member functions

into  mysql.com:/usr/home/bar/mysql-5.1-new

into  mysql.com:/usr/home/bar/mysql-5.1-new

into mysql.com:/home/psergey/mysql-5.1-bug18025-r2

 - Fix typo bug in SEL_ARG::is_singlepoint()
 - In set_up_range_analysis_info(), treat MEDIUMINT as enumerable type just like other integer types

into mysql.com:/home/gluh/MySQL/Merge/5.1-new

into  rurik.mysql.com:/home/igor/mysql-5.1