Merge macbook.gmz:/Users/kgeorge/mysql/work/mysql-5.0-opt

into  macbook.gmz:/Users/kgeorge/mysql/work/merge-5.1-opt


BitKeeper/deleted/.del-ps_6bdb.result:
  Auto merged
client/mysql.cc:
  Auto merged
mysql-test/r/delete.result:
  Auto merged
mysql-test/r/merge.result:
  Auto merged
mysql-test/r/ps_2myisam.result:
  Auto merged
mysql-test/r/ps_3innodb.result:
  Auto merged
mysql-test/r/ps_4heap.result:
  Auto merged
mysql-test/r/ps_5merge.result:
  Auto merged
mysql-test/r/type_bit.result:
  Auto merged
mysql-test/suite/ndb/r/ps_7ndb.result:
  Auto merged
mysql-test/t/delete.test:
  Auto merged
mysql-test/t/merge.test:
  Auto merged
mysql-test/t/variables.test:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/protocol.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_insert.cc:
  Auto merged
sql-common/my_time.c:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
storage/myisam/ha_myisam.cc:
  Auto merged
tests/mysql_client_test.c:
  Auto merged
mysql-test/r/myisam.result:
  merge 5.0-opt -> 5.1-opt
mysql-test/r/subselect.result:
  merge 5.0-opt -> 5.1-opt
mysql-test/t/myisam.test:
  merge 5.0-opt -> 5.1-opt
mysql-test/t/subselect.test:
  merge 5.0-opt -> 5.1-opt

sql/opt_range.cc

@@ -276,6 +276,9 @@ public:
   Field *field;
   uchar *min_value,*max_value;			// Pointer to range
 
+  /*
+    eq_tree() requires that left == right == 0 if the type is MAYBE_KEY.
+   */
   SEL_ARG *left,*right;   /* R-B tree children */
   SEL_ARG *next,*prev;    /* Links for bi-directional interval list */
   SEL_ARG *parent;        /* R-B tree parent */
@@ -291,7 +294,7 @@ public:
   SEL_ARG(Field *field, uint8 part, uchar *min_value, uchar *max_value,
 	  uint8 min_flag, uint8 max_flag, uint8 maybe_flag);
   SEL_ARG(enum Type type_arg)
-    :min_flag(0),elements(1),use_count(1),left(0),next_key_part(0),
+    :min_flag(0),elements(1),use_count(1),left(0),right(0),next_key_part(0),
     color(BLACK), type(type_arg)
   {}
   inline bool is_same(SEL_ARG *arg)