[Fix] Legacy helpers with fixed annotations

This fixes the helpers used for defining legacy baselines, when using fixed annotations. Beforehand, the instantiated cropper was still expecting to receive an "annotation" metadata, which broke the execution.

I fixed a similar issue a while ago for Tensorflow baselines but missed to also fix legacy baselines. ping @tiago.pereira

bob/bio/face/config/baseline/helpers.py

@@ -316,7 +316,7 @@ def crop_80x64(annotation_type, fixed_positions=None, color_channel="gray"):
     )
 
     transform_extra_arguments = (
-        None if cropped_positions is None else (("annotations", "annotations"),)
+        None if (cropped_positions is None or fixed_positions is not None) else (("annotations", "annotations"),)
     )
 
     return face_cropper, transform_extra_arguments