message: Fix character couter crash on plurals in POT file
diff: @@ -1012,7 +1012,7 @@ void EditingArea::UpdateCharCounter(CatalogItemPtr item)
  if (!m_charCounter || !item)
  return;
  - if (item->HasPlural())
  + if (item->HasPlural() && m_pluralNotebook)
  {
  int index = m_pluralNotebook->GetSelection();
  if (index == 0)
  