message: Move BasicCheck into unnamed namespace in PopulationPool
diff: #include <stdexcept>
  +namespace {
  void BasicCheck(Population::PersonRole _role);
  +}
  /**
  @@ -158,7 +160,7 @@ int PopulationPool::populationEmployed()
  // ===============================================================================
  -
  +namespace {
  /**
  * Does a basic check to ensure that we're only trying to pull population that can be employed.
  *
  @@ -187,3 +189,4 @@ void BasicCheck(Population::PersonRole _role)
  throw std::runtime_error("PopulationPool::BasicCheck(): Invalid population role specified (" + _popRole + ").");
  }
  }
  +}
  