This removes a warning about missing DBUG_ENTER while running tests

Add missing DBUG_RETURN
Fixed stack overflow in NdbBlob (found by ndb_gis.test)
Fixed access to freed memory in ndb_cluster_real_free_share()

Added missing DBUG_xxx_RETURN statements
Fixed some usage of not initialized variables (as found by valgrind)
Ensure that we don't remove locked tables used as name locks from open table cache until unlock_table_names() are called.
This was fixed by having drop_locked_name() returning any table used as a name lock so that we can free it in unlock_table_names()
This will allow Tomas to continue with his work to use namelocks to syncronize things.

Note: valgrind still produces a lot of warnings about using not initialized code and shows memory loss errors when running the ndb tests

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

into  zim.(none):/home/ian/workspace/mysql-5.1-new

Updated bug message in disabled file -Brian

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

An invalid assertion in Item_direct_view_ref::eq caused 
an assertion abort in the debug version.

into  zim.(none):/home/ian/workspace/mysql-5.0

There still may be issues on the Window's side from what I can see from doing a grep. 

into mysql.com:/Users/kent/mysql/bk/mysql-5.0-new

now using CONFIGURE_FILE and INCLUDE to generate handlerton.cc and to set the definitions based on
the storage engines given on the command line

into mysql.com:/Users/kent/mysql/bk/mysql-5.0-new

  Remove Solaris -xc99=none C option as C++ compiler can't handle it

in older version.

The problem is that TRN-files created in "old" versions contain
junk in trigger_table field, which is not acceptable in "new" versions.

into mysql.com:/Users/kent/mysql/bk/mysql-5.0-new

  We are not to control what malloc package others are to use, remove -lmtmalloc from --libs(_r), bug#18322

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

into  mysql.com:/home/ndbdev/skozlov/mysql-5.1-new

into  mysql.com:/home/my/mysql-5.0

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

into  mysql.com:/space/pekka/ndb/version/my51

into  mysql.com:/home/my/mysql-5.0

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0

into  mysql.com:/home/kgeorge/mysql/5.1/B15102

  Reproduced in 5.0.16-nt. Tested to work in 5.0.20
  

into  mysql.com:/home/my/mysql-5.0

This fixes the problem if someone is using struct MYSQL as part of another structure together with a shared
library

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0

into  perch.ndb.mysql.com:/home/jonas/src/mysql-4.1

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new

into  perch.ndb.mysql.com:/home/jonas/src/50-work