Bug#19392: Rename Database: Crash if case change
  Additional minor fix, to avoid compiler warnings.

Problem:
Renaming a database to itself crashed server.
It hapenned because of wrong DBUG_ASSERT.
Fix: removing wrong DBUG_ASSERT. Now it reports
a correct error message "database alreadt exists".

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

  Adjusted merge

into  mysql.com:/tmp/mysql-5.1-new

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

into mysql.com:/M51/merge-5.1

into  mysql.com:/usr/local/mysql/tmp-5.1

into  mysql.com:/home/kgeorge/mysql/5.1/merge

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

into  zippy.(none):/home/cmiller/work/mysql/merge/mysql-5.1-new

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

    ndb: ndb_waiter disconnect/reconnect on get status error

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

- adoptions to handle binlog

into  mysql.com:/home/ndbdev/jmiller/clones/mysql-5.1-new

  Fix for failure in aix52 failure during push build

into  mysql.com:/usr/local/mysql/tmp-5.1

  corrected merge

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

- not having lock can cause "block number list" to become corrupt => crash
- also may result in 2 threads receiving same block no => possble cause of
Bug #13987 Cluster: Loss of data nodes can cause high CPU usage from ndb_mgmd

into  poseidon.ndb.mysql.com:/home/tomas/mysql-4.1

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new-ndb

into  mysql.com:/home/mysql-5.1-18997e

if input year for date_add() / date_sub() with INTERVAL is low enough for
calc_daynr() to possibly return incorrect results (calc_daynr() has no information
on whether the year is low because it was a two-digit year ('77) or because it
was a really low four-digit year (0077) and will indiscriminately try to turn the
value into a four-digit year by adding 1900 or 2000 respectively), the functions
will now throw NULL.

into  mysql.com:/data0/mysqldev/my/mysql-5.1-new

into  zippy.(none):/home/cmiller/work/mysql/merge/mysql-5.1-new

into  a193-229-222-105.elisa-laajakaista.fi:/home/my/bk/mysql-5.1-new

into  mysql.com:/usr/local/mysql/tmp-5.1