Make GlobalArea::getTotalBlocksInArea compatible with Area::getTotalBlocksInArea
Make GlobalArea::getTotalBlocksInArea compatible with Area::getTotalBlocksInArea

MichaelMaar/concrete5,TimDix/concrete5,matt9mg/concrete5,avdevs/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,avdevs/concrete5,TimDix/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,avdevs/concrete5,TimDix/concrete5