message: Fix CuBLAS norm2 calls.
diff: @@ -332,8 +332,10 @@ void compute_norm2(std::shared_ptr<const CudaExecutor> exec,
  {
  if (cublas::is_supported<ValueType>::value) {
  auto handle = cublas::init();
  - cublas::norm2(handle, result->get_size()[1], result->get_values(),
  - result->get_stride(), result->get_values());
  + for (size_type col = 0; col < x->get_size()[1]; ++col) {
  + cublas::norm2(handle, x->get_size()[0], x->get_const_values() + col,
  + x->get_stride(), result->get_values() + col);
  + }
  cublas::destroy(handle);
  } else {
  compute_dot(exec, x, x, result);
  