Log Message:
Update to 5.1.42:

------------------------------------------------------------
revno: 3239
committer: MySQL Build Team <build@mysql.com>
branch nick: mysql-5.1.42-release
timestamp: Wed 2009-12-16 14:21:02 +0100
message:
  Merge
    ------------------------------------------------------------
    revno: 3238.1.6
    committer: Ramil Kalimullin <ramil@mysql.com>
    branch nick: mysql-5.1-pe-stage
    timestamp: Tue 2009-12-15 21:08:21 +0400
    message:
      Fix for bug#49517: Inconsistent behavior while using 
      NULLable BIGINT and INT columns in comparison
      
      Problem: a consequence of the fix for 43668.
      Some Arg_comparator inner initialization missed,
      that may lead to unpredictable (wrong) comparison
      results.
      
      Fix: always properly initialize Arg_comparator
      before its usage.
    ------------------------------------------------------------
    revno: 3238.1.5
    committer: Georgi Kodinov <joro@sun.com>
    branch nick: merge-5.1-pe-stage
    timestamp: Tue 2009-12-15 11:03:24 +0200
    message:
      Bug #48985: show create table crashes if previous access to the table 
        was killed
      
      Merge the fix from 5.1-bugteam to 5.1-main
    ------------------------------------------------------------
    revno: 3238.1.4
    committer: Georgi Kodinov <joro@sun.com>
    branch nick: merge-5.1-pe-stage
    timestamp: Tue 2009-12-15 10:54:53 +0200
    message:
      Bug#49489: Uninitialized cache led to a wrong result.
      
      Merge the fix from 5.1-bugteam to 5.1-main
    ------------------------------------------------------------
    revno: 3238.1.3
    committer: Georgi Kodinov <joro@sun.com>
    branch nick: merge-5.1-pe-stage
    timestamp: Tue 2009-12-15 10:37:10 +0200
    message:
      Bug #49480: WHERE using YEAR columns returns unexpected results
      
      Merge the fix from 5.1-bugteam to 5.1-main
    ------------------------------------------------------------
    revno: 3238.1.2
    author: sunanda.menon@sun.com
    committer: MySQL Build Team <build@mysql.com>
    branch nick: mysql-5.1
    timestamp: Tue 2009-12-08 10:26:11 +0100
    message:
      Null-merge from mysql-5.1.40sp1-release
        ------------------------------------------------------------
        revno: 3138.8.21
        tags: mysql-5.1.40sp1
        committer: MySQL Build Team <build@mysql.com>
        branch nick: mysql-5.1.40sp1-release
        timestamp: Wed 2009-11-25 23:43:37 +0100
        message:
          Patch adjustments