message: Fix bug in mondrian miniapp
diff: @@ -356,7 +356,7 @@ int material(const ParsePGM &pgm, int NC, Vector &x, Vector &xmin, Vector &xmax)
  int M = pgm.Width();
  int N = pgm.Height();
  - int i = (int)x(1)*N, j = (int)x(0)*M;
  + int i = (int)(x(1)*N), j = (int)(x(0)*M);
  if (i == N) { i = N-1; }
  if (j == M) { j = M-1; }
  i = N-1-i;
  