message: Fix memory leak in FA assembly
diff: @@ -903,7 +903,8 @@ void FABilinearFormExtension::Assemble()
  }
  else // We create, compute the sparsity, and fill the sparse matrix
  {
  - mat = new SparseMatrix(height, width, 0);
  + mat = new SparseMatrix;
  + mat->OverrideSize(height, width);
  if (fes.IsDGSpace())
  {
  const L2ElementRestriction *restE =
  