objects with parents containing keyframe animations, but which don't...

objects with parents containing keyframe animations, but which don't themselves contain keyframe animations, break the exporter

utils/exporters/blender/addons/io_three/exporter/api/object.py

@@ -174,9 +174,13 @@ EXPORTED_TRACKABLE_FIELDS = [ "location", "scale", "rotation_quaternion" ]
 
 @_object
 def animated_xform(obj, options):
+    if obj.animation_data is None:
+        return []
     fcurves = obj.animation_data
     if not fcurves:
         return []
+    if fcurves.action is None:
+        return []
     fcurves = fcurves.action.fcurves
 
     objName = obj.name