[scanbase] keep original behavior: flat_field_correction always return a list...

[scanbase] keep original behavior: flat_field_correction always return a list of nuloy array even if flat field correction fails

tomoscan/scanbase.py

@@ -551,20 +551,27 @@ class TomoScanBase:
         if dark is None:
             if self._notify_ffc_rsc_missing:
                 _logger.error("cannot make flat field correction, dark not found")
-                return
+                return [
+                    get_data(proj) if isinstance(proj, DataUrl) else proj
+                    for proj in projs
+                ]
 
         if dark is not None and dark.ndim != 2:
             _logger.error(
                 "cannot make flat field correction, dark should be of " "dimension 2"
             )
-            return
+            return [
+                get_data(proj) if isinstance(proj, DataUrl) else proj for proj in projs
+            ]
 
         return [
             self._frame_flat_field_correction(
                 data=frame,
                 dark=dark,
                 index_proj=proj_i,
-                flat_weights=self._flats_weights[proj_i],
+                flat_weights=self._flats_weights[proj_i]
+                if proj_i in self._flats_weights
+                else None,
             )
             for frame, proj_i in zip(projs, proj_indexes)
         ]