Fixed a number of bugs

Moved error inject from being flags to compiler to being part of config.h
Also error inject only defined if debug is also defined
+Small fixes

After review changes

into  c-4908e253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/wl2826

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

More review fixes

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

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

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

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

into  mysql.com:/opt/local/work/mysql-5.1-merge

into  mysql.com:/opt/local/work/mysql-5.1-merge

into  mysql.com:/opt/local/work/mysql-5.1-merge

into  mysql.com:/opt/local/work/mysql-5.1-merge

into  mysql.com:/home/cps/mysql/devel/5.1-repair-csv

  Added BTR_CHUNK_SIZE, removed 'chunk_size' declared after declaration block

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