Make sure "select" aborts when finding a SP condition handler beyond the current scope.


mysql-test/r/sp.result:
  Updated test results after fixing error handling in select.
sql/mysqld.cc:
  Make sure "select" aborts when finding a SP condition handler beyond the current scope.
sql/protocol.cc:
  Make sure "select" aborts when finding a SP condition handler beyond the current scope.
sql/sp_rcontext.h:
  Added method for checking if the handler was found in the current context.
sql/sql_error.cc:
  Make sure "select" aborts when finding a SP condition handler beyond the current scope.