When view column aliased in subselect alias is set on ref which represents
field. When tmp table is created for subselect, it takes name of original field
not ref. Because of this alias on view column in subselect is lost. Which
results in reported error.

Now when alias is set on ref, it's set on ref real item too.

into  snake-hub.snake.net:/src/extern/MySQL/bk/mysql-5.0

  Fix some comments.

into mysql.com:/home/psergey/mysql-5.0-merge

into  radha.local:/Users/patg/mysql-build/mysql-5.0.bug12597

into  radha.local:/Users/patg/mysql-build/mysql-5.0.bug9056

into  c-4a09e253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/mysql-5.0

into  c-4a09e253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/mysql-5.0

into  radha.local:/Users/patg/mysql-build/mysql-5.0.bug9056

into  radha.local:/Users/patg/mysql-build/mysql-5.0.bug12597

into  c-4a09e253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug12594

into mysql.com:/home/psergey/mysql-5.0-merge

into  radha.local:/Users/patg/mysql-build/mysql-5.0.bug9056

into  mysql.com:/home/alexi/dev/mysql-5.0-12101

into mysql.com:/home/psergey/mysql-5.0-merge

thd->user_var_events_alloc (and so get binlog events to be allocated on its pool), 
clean the binlog events after the execution of this SP statement is finished.

into  mysql.com:/home/alexi/dev/mysql-5.0-12101

into mysql.com:/home/gluh/MySQL/Merge/5.0

into lmy004.:/work/mysql-5.0-bug12651

into mysql.com:/home/psergey/mysql-5.0-merge

into serg.mylan:/usr/home/serg/Abk/mysql-5.0

into lmy004.:/work/mysql-5.0-bug12651

   This fix is cancellation of ChangeSet
   1.2329 05/07/12 08:35:30 reggie@linux.site +8 -0
   Bug 7142  Show Fields from fails using Borland's dbExpress interface
   The reason is we can't fix bug#7142 without
   breaking of existing applications/APIs that worked fine with earlier 4.1
   bug 7142 is fixed in 5.0

into lmy004.:/work/mysql-5.0-bug12651

into lmy004.:/work/mysql-5.0-bug12651

into serg.mylan:/usr/home/serg/Abk/mysql-5.0