This is a special patch.  It shouldn't be  applied at the start of the
"build" process;  the file  that  it modifies  doesn't exist,  at that
point.

This patch sets an environment variable PNMREMAPRAND equal to the word
NO.  This  tells the local distro's version of  "pnmremap.c" to  use a
fixed random-number seed.

For more information, see the following files:

      ../cfg
      ../patches/*-remapvar.patch

--- ppmquantnr.old
+++ ppmquantnr
@@ -22,6 +22,7 @@
 my $validOptions = GetOptions("mapfile" => \my $mapfileopt);
 
 my $mapfileOptionPresent = ($validOptions && $mapfileopt);
+$ENV {PNMREMAPRAND} = 'NO';
 
 if ($mapfileOptionPresent) {
     system("pnmremap", @ppmquantArgv);