Fixed problem with t1 LEFT_JOIN t2 ... WHERE t2.date_column IS NULL when date_column is declared as NOT NULL.


BUILD/SETUP.sh:
  Use -O1 to avoid problem with INLINE functions
Docs/manual.texi:
  Changelog
mysql-test/r/join.result:
  Test for bugfix
mysql-test/t/join.test:
  Test for bugfix
sql/sql_select.cc:
  Fixed problem with t1 LEFT_JOIN t2 ... WHERE t2.date_column IS NULL when date_column was declared as NOT NULL.
BitKeeper/etc/ignore:
  Added bdb/include/db_ext.h bdb/include/mutex_ext.h to the ignore list