message: working around Windows VC++ compiler bugs
diff: @@ -228,11 +228,19 @@ static void test_load_align_column() {
  df.load_data(std::move(idxvec),
  std::make_pair("int_col", intvec));
  - df.load_align_column("summary_col", std::move(summary_vec), 5, true);
  + df.load_align_column("summary_col",
  + std::move(summary_vec),
  + 5,
  + true,
  + std::sqrt(-1));
  std::vector<double> summary_vec_2 = { 102, 202, 302, 402, 502 };
  - df.load_align_column("summary_col_2", std::move(summary_vec_2), 5, false);
  + df.load_align_column("summary_col_2",
  + std::move(summary_vec_2),
  + 5,
  + false,
  + std::sqrt(-1));
  assert(df.get_column<double>("summary_col").size() == 28);
  assert(df.get_column<double>("summary_col_2").size() == 28);
  