Fix T42482: FBX import issue when scale is not 1.0.

Looks like FBX's 'Root' bone is same as our armature object?

io_scene_fbx/import_fbx.py

@@ -2162,7 +2162,7 @@ def load(operator, context, filepath="",
             assert(fbx_props[0] is not None)
 
             transform_data = blen_read_object_transform_preprocess(fbx_props, fbx_obj, Matrix(), use_prepost_rot)
-            is_bone = fbx_obj.props[2] in {b'LimbNode', b'Root'}
+            is_bone = fbx_obj.props[2] in {b'LimbNode'}  # Note: 'Root' "bones" are handled as (armature) objects.
             fbx_helper_nodes[a_uuid] = FbxImportHelperNode(fbx_obj, bl_data, transform_data, is_bone)
 
         # add parent-child relations and add blender data to the node