Implementation of mysql_multi_update did not call multi_update::send_error method in some cases 
(see the test reported on bug page and test cases in changeset).

Fixed with deploying the method, ::send_error() is refined to get binlogging code which works whenever 
there is modified non-transactional table.
thd->no_trans_update.stmt flag is set in to TRUE to ease testing though being the beginning of relative 
bug#27417 fix (addresses a part of those issues).
Eliminating two minor issues (small bugs) in multi_update methods.
This patch for multi-update also addresses a part of the issues reported in bug#13270,bug#23333.


mysql-test/r/innodb.result:
  result changed
mysql-test/r/multi_update.result:
  results changed
mysql-test/t/innodb.test:
  regression test for the bug combining transactional and non-transaction tables
mysql-test/t/multi_update.test:
  regression tests added - erred query must be binlogged
sql/sql_update.cc:
  making a call to multi_update::send_error when mysql_select return an error;
  deploying binlogging inside of ::send_error;
  refining multi_update::send_eof() to mark binlogging work done when its call to ::do_updates() errs
  and the query is binlogged with the error. ::send_error() will be called after all but
  do not do anything;
  thd->no_trans_update.stmt is corrected to be set to TRUE according to the existed code pattern. 
  Although this part relates to another bugs (bug#27417 etc) it is needed here for testing;
  Eliminating a separate issue in multi_update::do_updates where                
  either one of the class members trans_safe, transactional_tables was          
  set after the per-table loop whereas both should be calculated during         
  looping. 
  Eliminating a separate issue in ::send_eof() where thd->no_trans_update.all won't be set TRUE when
  amoung others there'd be at least one modified transactional table.
  Binlogging is done to satisfy to general character bug#13270,bug#23333 so that those won't have
  fixes specific for multi-update.