[external] CSparse_extensions fix missing license
+/* Siconos, Copyright INRIA 2005-2016.
+ * Siconos is a program dedicated to modeling, simulation and control
+ * of non smooth dynamical systems.
+ * Siconos is a free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * Siconos 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Siconos; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Contact: Vincent ACARY, siconos-team@lists.gforge.inria.fr
+ */
+
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
