message: Make compile on windows
  Encode table key in ColKey instead of a ramdom number.
diff: @@ -2225,8 +2225,9 @@ ColKey Table::generate_col_key(ColumnType tp, ColumnAttrMask attr)
  REALM_ASSERT(!attr.test(col_attr_Unique)); // Must not be encoded into col_key
  // FIXME: Change this to be random number mixed with the TableKey.
  RefOrTagged rot = m_top.get_as_ref_or_tagged(top_position_for_column_key);
  - unsigned upper = unsigned(rot.get_as_int() ^ random());
  - rot = RefOrTagged::make_tagged(upper + 1);
  + int64_t index = rot.get_as_int();
  + unsigned upper = unsigned(index ^ get_key().value);
  + rot = RefOrTagged::make_tagged(index + 1);
  m_top.set(top_position_for_column_key, rot);
  // reuse lowest available leaf ndx:
  