message: Use static_cast to silence warnings in StructureListBox
diff: @@ -168,8 +168,8 @@ void StructureListBox::update()
  drawItem(renderer, *static_cast<StructureListBoxItem*>(mItems[i]),
  positionX(),
  positionY() + (static_cast<int>(i) * LIST_ITEM_HEIGHT),
  - item_width(),
  - draw_offset(),
  + static_cast<int>(item_width()),
  + static_cast<int>(draw_offset()),
  i == currentSelection());
  }
  