fixed flip-footprint for buildings to update world footprints
fixed flip-footprint for buildings to update world footprints

markraz/vtp,seanisom/vtp,markraz/vtp,nakijun/vtp,markraz/vtp,markraz/vtp,seanisom/vtp,nakijun/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,nakijun/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp