while space allocation

Under some circumstances DISTINCT clause can be converted to grouping.
In such cases grouping is performed by all items in the select list.
If an ORDER clause is present then items from it is prepended to group list.
But the case with ORDER wasn't taken into account when allocating the
array for sum functions. This leads to memory corruption and crash.

The JOIN::alloc_func_list() function now allocates additional space if there
is an ORDER by clause is specified and DISTINCT -> GROUP BY optimization is
possible.

into  trift2.:/MySQL/M50/push-5.0

into  mysql.com:/Users/kent/mysql/bk/mysql-5.0

  Filter out plain -O and Sun C/C++ style optimization flags, -xO<level>
  Filter out icc specific options from cflags/libs(_r)

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-5.0-merge

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-5.0-merge

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-4.1-merge

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-5.0-merge

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-4.1-merge

into  trift2.:/MySQL/M50/push-5.0

into  chilla.local:/home/mydev/mysql-5.0-toteam

into  trift2.:/MySQL/M50/push-5.0

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-5.0-merge

into  chilla.local:/home/mydev/mysql-5.0-toteam

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-5.0-merge

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-5.0-merge

into  mysql.com:/users/lthalmann/bk/MERGE/mysql-4.1-merge

into  chilla.local:/home/mydev/mysql-4.1-bug14400-monty

into  chilla.local:/home/mydev/mysql-5.0-bug14400-monty

into  chilla.local:/home/mydev/mysql-4.1-bug14400-monty

into  chilla.local:/home/mydev/mysql-5.0--team

into  chilla.local:/home/mydev/mysql-5.0--team

into  may.pils.ru:/home/svoj/devel/mysql/merge/mysql-4.1-engines

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt

into  april.(none):/home/svoj/devel/mysql/merge/mysql-5.0-engines

into  april.(none):/home/svoj/devel/mysql/merge/mysql-5.0-engines

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-4.1-opt

 by master and slave is made.

containing a select statement that uses an aggregating IN subquery.
Added a parameter to the function fix_prepare_information 
to restore correctly the having clause for the second execution.
Saved andor structure of the having conditions at the proper moment
before any calls of split_sum_func2 that could modify the having structure
adding new Item_ref objects. (These additions, are produced not with 
the statement mem_root, but rather with the execution mem_root.)