message: fixed MatrixArrayCoefficient::Eval bug
diff: @@ -431,6 +431,7 @@ MatrixArrayCoefficient::~MatrixArrayCoefficient ()
  void MatrixArrayCoefficient::Eval(DenseMatrix &K, ElementTransformation &T,
  const IntegrationPoint &ip)
  {
  + K.SetSize(height, width);
  for (int i = 0; i < height; i++)
  {
  for (int j = 0; j < width; j++)
  