return error if engine is disabled

into  bk-internal.mysql.com:/data0/bk/mysql-5.1-kt

into  zim.(none):/home/brian/mysql/dep-5.1

into  bodhi.local:/opt/local/work/mysql-5.1-runtime-merge

into  zim.(none):/home/brian/mysql/dep-5.0

into  bk-internal.mysql.com:/data0/bk/mysql-5.1-kt

into  may.pils.ru:/home/svoj/devel/mysql/BUG18874/mysql-5.0

into  bodhi.local:/opt/local/work/mysql-5.1-runtime-merge

Fixed by moving update_key_parts() down to be after write_index().

Fix for bug#20648 We introduce a new field method for knowing "real size", and we now in archive null unused bits of a row to null before writing. 

into  bodhi.local:/opt/local/work/mysql-5.1-runtime-merge

into  may.pils.ru:/home/svoj/devel/mysql/BUG7391/mysql-5.0

into  govinda.patg.net:/home/patg/mysql-build/mysql-5.1-engines-merge

into  govinda.patg.net:/home/patg/mysql-build/mysql-5.1-engines-merge

into  bk-internal.mysql.com:/data0/bk/mysql-5.1-kt

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.1-runtine-merge

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.1-merge

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.1-merge

into  janus.mylan:/usr/home/serg/Abk/m51

how did it get in?!? (it's only in local csets so no other tree is affected)

into janus.mylan:/usr/home/serg/Abk/m51

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.1-merge

into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.0

  After merge fix

into  bk-internal.mysql.com:/data0/bk/mysql-5.1-kt

into  lmy004.:/work/mysql-5.1-runtime

    
create function func() returns char(10) binary ...
is no more possible. This will be reenabled when 
bug 2676 "DECLARE can't have COLLATE clause in stored procedure"
is fixed.

Fix after 2nd review

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.1-rt-merge

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.1-merge