fix for one frame

bob/io/stream/stream.py

@@ -413,15 +413,13 @@ class StreamFile():
 
         if isinstance(index, int):
             data = self.hdf5_file.lread(data_path, index)
-            return data
+            return np.stack([data])
         elif isinstance(index, slice):
             num_frame = self.get_stream_shape(stream_name)
-            print(num_frame)
             if index.step == None:
                 indices = list(range(index.start, index.stop))
             else:
                 indices = list(range(index.start, index.stop, index.step))
-                print(indices)
             data = np.stack([self.hdf5_file.lread(data_path, i) for i in indices])
             return data
         else: