message: Handle a null twoda properly
diff: @@ -267,7 +267,7 @@ ArgumentStack Util::Get2DARowCount(ArgumentStack&& args)
  ArgumentStack stack;
  const auto twodaRef = Services::Events::ExtractArgument<std::string>(args);
  auto twoda = Globals::Rules()->m_p2DArrays->GetCached2DA(twodaRef.c_str(), true);
  - Services::Events::InsertArgument(stack, twoda->m_nNumRows);
  + Services::Events::InsertArgument(stack, twoda ? twoda->m_nNumRows : 0);
  return stack;
  }
  