tables corrupt triggers".

It turned out that we also have relied at certain places that
(new_table != table_name) were always true on Windows and for transactional
tables. Since our fix for the bug brakes this assumption we have to add new
flag to pass this information around.
This code needs to be refactored but I dare not to do this in 5.0.


sql/sql_table.cc:
  mysql_alter_table():
    Follow-up for the fix for bug #18153 "ALTER/OPTIMIZE/REPAIR on
    transactional tables corrupt triggers". It turned out that we also have
    relied at certain places that (new_table != table_name) were always true
    on Windows and for transactional tables. Since our fix for the bug brakes
    this assumption we have to add new flag to pass this information around.
    This code needs to be refactored but I dare not to do this in 5.0.