[devel] Mention zlib-libpng license in each source file
diff --git a/scripts/makefile.beos b/scripts/makefile.beos
index b2dd3a0..ab41654 100644
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -3,6 +3,8 @@
 # Copyright (C) 2002, 2006, 2008 Glenn Randers-Pehrson
 # Copyright (C) 1999 Greg Roelofs
 # Copyright (C) 1996, 1997 Andreas Dilger
+#
+# This code is released under the zlib-libpng license.
 # For conditions of distribution and use, see copyright notice in png.h
 
 # Library name: