pnCCD: fix shape of preview outputs

#57 (closed)

src/calng/corrections/PnccdCorrection.py

@@ -332,8 +332,8 @@ class PnccdCpuRunner(base_kernel_runner.BaseKernelRunner):
 
     def _preview_data_views(self, raw_data, processed_data):
         return [
-            raw_data[np.newaxis],
-            processed_data[np.newaxis],
+            raw_data,
+            processed_data,
         ]