fix crop_keypoints()

src/augmentations/functional.py

@@ -362,7 +362,7 @@ def crop_keypoints(keypoints,
                    pad_dims,
                    keep_all: bool):
 
-    (px, _), (py, _), (pz, _) = pad_dims
+    px, _, py, _, pz, _ = pad_dims
     pad = np.array((px, py, pz))
 
     res = []