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diff --git a/storage/innodb_plugin/include/trx0roll.ic b/storage/innodb_plugin/include/trx0roll.ic
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+++ b/storage/innodb_plugin/include/trx0roll.ic
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+/*****************************************************************************
+
+Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; version 2 of the License.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+
+*****************************************************************************/
+
+/**************************************************//**
+@file include/trx0roll.ic
+Transaction rollback
+
+Created 3/26/1996 Heikki Tuuri
+*******************************************************/
+
+/*******************************************************************//**
+Returns pointer to nth element in an undo number array.
+@return	pointer to the nth element */
+UNIV_INLINE
+trx_undo_inf_t*
+trx_undo_arr_get_nth_info(
+/*======================*/
+	trx_undo_arr_t*	arr,	/*!< in: undo number array */
+	ulint		n)	/*!< in: position */
+{
+	ut_ad(arr);
+	ut_ad(n < arr->n_cells);
+
+	return(arr->infos + n);
+}