some change in wall.py
some change in wall.py

jamiebull1/eppy,eayoungs/eppy,santoshphilip/eppy,pachi/eppy,jamiebull1/eppy,eayoungs/eppy,eayoungs/eppy,jamiebull1/eppy,santoshphilip/eppy,pachi/eppy,pachi/eppy,santoshphilip/eppy