Update libpng to 1.2.38 to patch a minor security issue.
diff --git a/scripts/makefile.knr b/scripts/makefile.knr
index 44ee538..7b46585 100644
--- a/scripts/makefile.knr
+++ b/scripts/makefile.knr
@@ -1,7 +1,10 @@
# makefile for libpng
-# Copyright (C) 2002 Glenn Randers-Pehrson
+# Copyright (C) 2002, 2006, 2009 Glenn Randers-Pehrson
# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
-# For conditions of distribution and use, see copyright notice in png.h
+
+# This code is released under the libpng license.
+# For conditions of distribution and use, see the disclaimer
+# and license in png.h
# This makefile requires the file ansi2knr.c, which you can get
# from the Ghostscript ftp site at ftp://ftp.cs.wisc.edu/ghost/
@@ -58,7 +61,7 @@
test: pngtest
./pngtest
-install: libpng.a
+install: libpng.a png.h pngconf.h
-@mkdir $(DESTDIR)$(INCPATH)
-@mkdir $(DESTDIR)$(INCPATH)/libpng
-@mkdir $(DESTDIR)$(LIBPATH)
@@ -92,8 +95,9 @@
pngpread.o: png.h pngconf.h
pngrtran.o: png.h pngconf.h
pngrutil.o: png.h pngconf.h
-pngtest.o: png.h pngconf.h
pngtrans.o: png.h pngconf.h
pngwrite.o: png.h pngconf.h
pngwtran.o: png.h pngconf.h
pngwutil.o: png.h pngconf.h
+
+pngtest.o: png.h pngconf.h