add missing protected point

Author: tomvanmele

src/compas_model/elements/element.py

@@ -142,6 +142,7 @@ def __init__(
         self._collision_mesh = None
         self._modelgeometry = None
         self._modeltransformation = None
+        self._point = None
 
         self.include_features = False
         self.inflate_aabb = 0.0