[devel] Revised contrib/pngminim to use the "everything off" option

in pngusr.dfa.

contrib/pngminim/decoder/pngusr.dfa

@@ -0,0 +1,27 @@
+# pngminim/decoder/pngusr.dfa
+#
+# Copyright (c) 2010 Glenn Randers-Pehrson
+#
+# This code is released under the libpng license.
+# For conditions of distribution and use, see the disclaimer
+# and license in png.h
+
+# First all the build options off:
+everything = off
+
+# All that is required is some read code. This example switches
+# on the sequential read code (see ../preader for a progressive
+# read example).
+option SEQUENTIAL_READ on
+
+# You must choose fixed or floating point arithmetic:
+option FLOATING_POINT on
+# option FIXED_POINT on
+
+# Your program will probably need other options.  The example
+# program here, pngm2pnm, requires the following.  Take a look
+# at pnglibconf.h to find out the full set of what has to be
+# enabled to make the following work.
+option SETJMP on
+option STDIO on
+option READ_EXPAND on