Merge abotchkov@bk-internal.mysql.com:/home/bk/mysql-4.1

into deer.mysql.r18.ru:/home/hf/work/mysql-4.1.clean

sql/sql_list.h

@@ -201,6 +201,8 @@ class base_list_iterator
       *new_list.last=current->next;
       current->info=new_list.first->info;
       current->next=new_list.first->next;
+      if ((list->last == &current->next) && (new_list.elements > 1))
+	list->last= new_list.last;
       list->elements+=new_list.elements-1;
     }
     return ret_value;				// return old element