We create Item_cache_* object for each operand for each left operand of
a subquery predicate. We also create Item_func_conv_charset for each string
constant that needs charset conversion. So here we have Item_cache wrapped
into Item_func_conv_charset.
When Item_func_conv_charset wraps an constant Item it gets it's value
in constructor. The problem is that Item_cache is ready to be used only
at execution time, which is too late.
The fix makes Item_cache wrapping constant to get ready at fix_fields() time.

  dummy commit to trigger pushbuild

into  dl145s.mysql.com:/data0/bk/team_tree_merge/MERGE/mysql-5.1-opt

Disabling debug printouts for valgrind builds that print unallocated memory.

Removing valgrind memory checks from code.

Patch to fix valgrind warning that uninitialized bytes were written. 
The warning was caused by set_default(), which assumes that the field pointer is pointing
into record[0], while all other functions honors the move_field_offset().

into  macbook.gmz:/Users/kgeorge/mysql/work/merge-5.1-opt

into  macbook.gmz:/Users/kgeorge/mysql/work/merge-5.1-opt

into  romeo.(none):/home/bk/memcheck-mysql-5.1

Removing DBUG_DUMP printouts for valgrind builds since they trigger warnings.
Removing valgrind memory checks completely.
Removing bzero() of record when opening table that was added earlier.

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

disable filling of I_S tables for EXPLAIN

into  romeo.(none):/home/bk/memcheck-mysql-5.1

Fix to correct behaviour of find_and_fetch_row() for tables that have primary keys stored
in storage engines that support the fast method to fetch rows given a primary key. The
method uses position() to retrieve the key for a given record and rnd_pos() to position
the internal "cursor" at the row. Rnd_pos() returns the found record in table->record[0],
so the record has to be moved to table->record[1] for further processing after calling
find_and_fetch_row().

into  amd64.:D:/src/mysql-5.1_bug23983

- When a shared library argument is supplied, it's checked for an OS
specific directory separator. The expected error is different
depending on the separator used. Create OS specific versions of these
tests.

  - Disconnect from transporter before starting to delete objects

into  mysql.com:/home/hf/work/mysql-5.1-mrg

into  mysql.com:/home/hf/work/mysql-5.0-mrg

into  mysql.com:/home/hf/work/mysql-5.1-mrg

into  mysql.com:/home/hf/work/mysql-5.0-mrg

  
  open_table_from_share did not initialize table->record members. that was
  interpreted as the error by valgrind.
  
  Fixed with bzero-ing the members if compilation with -DHAVE_purify.

into  mysql.com:/home/hf/work/mysql-5.1-mrg

into  mysql.com:/home/hf/work/mysql-5.1-mrg

into  mysql.com:/home/hf/work/mysql-5.0-0mrg

into  mysql.com:/home/hf/work/mysql-5.0-mrg

into  mysql.com:/home/hf/work/mysql-4.1-mrg

into  romeo.(none):/home/bk/memcheck-mysql-5.1

Adding class to handle temporary allocate of memory during write of rows.
Eliminating cut'n-paste error between THD::binlog_{write,update,delete}_row().