server error messages file. (Bug #13071)

into  127.(none):/home/osku/mysql/5.0/clean

into moonbone.local:/work/12291-bug-5.0-mysql

into mysql.com:/M50/mysql-5.0

into  sanja.is.com.ua:/home/bell/mysql/bk/work-owner2-5.0

Optimizer did choose "Range checked for each record" for one of the tables.
For first few loops over that table it choose sequential access, on later
stage it choose to use index. Because table was previously initialized for 
sequential access, it skips intitialization for index access, and when
server tries to retrieve data error occurs.

QUICK_RANGE_SELECT::init() changes so if file already initialized for
sequential access, it calls ha_rnd_end() and initializes file for index
access.

into moonbone.local:/work/12887-bug-5.0-mysql

into moonbone.local:/work/12887-bug-5.0-mysql

into serg.mylan:/usr/home/serg/Abk/mysql-5.0

into moonbone.local:/work/12887-bug-5.0-mysql

into  mysql.com:/home/jimw/my/mysql-4.1-clean

into  selena.:H:/MYSQL/src/fin-mysql-5.0

into moonbone.local:/work/12887-bug-4.1-mysql

For queries with GROUP BY and without hidden GROUP BY fields DISTINCT is
optimized away becuase such queries produce result set without duplicates.
But ROLLUP can add rows which may be same to some rows and this fact was
ignored.

Added check so if ROLLUP is present DISTINCT can't be optimized away.

into moonbone.local:/work/11416-bug-5.0-mysql

into  mysql.com:/home/jimw/my/mysql-4.1-clean

into  selena.:H:/MYSQL/src/fin-mysql-5.0

into  mysql.com:/home/my/mysql-4.1

Ignored some generated files

into  sanja.is.com.ua:/home/bell/mysql/bk/work-owner2-5.0

into  mysql.com:/export/space/pekka/ndb/version/my50

into  mysql.com:/export/space/pekka/ndb/version/my50

  been branched off)

- tagged this ChangeSet as "clone-5.0.13-build"

      IGNORE on merge 4.1->5.0

into  sanja.is.com.ua:/home/bell/mysql/bk/work-owner2-5.0

into  neptunus.(none):/home/msvensson/mysql/bug13029/my50-bug13029

into  neptunus.(none):/home/msvensson/mysql/bug12526/my50-bug12526

-Applied patch from Todd

into  neptunus.(none):/home/msvensson/mysql/bug12526/my50-bug12526

into  mysql.com:/home/mydev/mysql-5.0-5000