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diff --git a/source/blender/freestyle/intern/geometry/HashGrid.cpp b/source/blender/freestyle/intern/geometry/HashGrid.cpp
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+++ b/source/blender/freestyle/intern/geometry/HashGrid.cpp
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+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2010 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/freestyle/intern/geometry/HashGrid.cpp
+ *  \ingroup freestyle
+ *  \brief Class to define a cell grid surrounding the bounding box of the scene
+ *  \author Stephane Grabli
+ *  \date 30/07/2002
+ */
+
+#include "HashGrid.h"
+
+void HashGrid::clear()
+{
+	if (!_cells.empty()) {
+		for (GridHashTable::iterator it = _cells.begin(); it !=_cells.end(); it++) {
+			Cell* cell = (*it).second;
+			delete cell;
+		}
+		_cells.clear();
+	}
+
+	Grid::clear();
+}
+
+void HashGrid::configure(const Vec3r& orig, const Vec3r& size, unsigned nb)
+{
+	Grid::configure(orig, size, nb);
+}