fix: get_data of integer types

Author: oesteban

niworkflows/interfaces/cifti.py

@@ -163,7 +163,7 @@ def _create_cifti_image(bold_file, label_file, annotation_files, gii_files,
 
         bold_data = bold_img.get_fdata(dtype='float32')
         timepoints = bold_img.shape[3]
-        label_data = np.asanyarray(label_img._dataobj, dtype='int16')
+        label_data = np.asanyarray(label_img.dataobj).astype('int16')
 
         # set up CIFTI information
         series_map = ci.Cifti2MatrixIndicesMap((0, ),

niworkflows/interfaces/freesurfer.py

@@ -281,9 +281,9 @@ def _run_interface(self, runtime):
         msknii = nb.Nifti1Image(
             grow_mask(anatnii.get_fdata(dtype='float32'),
                       np.asanyarray(
-                          nb.load(self.inputs.in_aseg)._dataobj, dtype='int16'),
+                          nb.load(self.inputs.in_aseg).dataobj).astype('int16'),
                       np.asanyarray(
-                          nb.load(self.inputs.in_ants)._dataobj, dtype='int16')),
+                          nb.load(self.inputs.in_ants).dataobj).astype('int16')),
             anatnii.affine,
             anatnii.header
         )