message: Add a more meaningful error in fa-test.
diff: @@ -390,7 +390,15 @@ int main(int argc, char *argv[])
  fflush(stdout); //force print!
  + GridFunction x(fes), y_fa(fes), y_ref(fes);
  + x.Randomize(1);
  + A.Mult(x,y_fa);
  + k_ref->Mult(x,y_ref);
  +
  + y_fa -= y_ref;
  +
  + std::cout << "Apply error = " << y_fa.Norml2() << std::endl;
  double iError(0), jError(0), dataError(0);
  for(int i=0; i<k_ref->SpMat().GetMemoryI().Capacity(); ++i){
  