add GPL license

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@4360 57a11ea4-9604-0410-9ed3-97b8803252fd

src/engine/sql/checkpoint.c

@@ -1,3 +1,25 @@
+/********************************************************************\
+ * checkpoint.c : computes account balance checkpoints              *
+ * Copyright (C) 2001 Linas Vepstas <linas@linas.org>               *
+ *                                                                  *
+ * 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, contact:                        *
+ *                                                                  *
+ * Free Software Foundation           Voice:  +1-617-542-5942       *
+ * 59 Temple Place - Suite 330        Fax:    +1-617-542-2652       *
+ * Boston, MA  02111-1307,  USA       gnu@gnu.org                   *
+\********************************************************************/
+
 /* 
  * FILE:
  * checkpoint.c