[gegl] matrix: add license and copyright notice to gegl-matrix.h

[N/A <ell src gnome org>]

commit d99a28101b3abb51483797b4c5b42ece36e838af
Author: Ell <ell_se yahoo com>
Date:   Sat Mar 3 02:41:46 2018 -0500

    matrix: add license and copyright notice to gegl-matrix.h

 gegl/gegl-matrix.h |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)
---
diff --git a/gegl/gegl-matrix.h b/gegl/gegl-matrix.h
index 8b68612..1a27d8a 100644
--- a/gegl/gegl-matrix.h
+++ b/gegl/gegl-matrix.h
@@ -1,3 +1,21 @@
+/* This file is part of GEGL
+ *
+ * GEGL is 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 3 of the License, or (at your option) any later version.
+ *
+ * GEGL 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 GEGL; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2006-2018 GEGL developers
+ */
+
 #ifndef __GEGL_MATRIX_H__
 #define __GEGL_MATRIX_H__