fix empty areaToModify variable if block is added to a global area
fix empty areaToModify variable if block is added to a global area

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