Fix 'ceil' is not defined

Author: dofuuz

vector_quantize_pytorch/residual_fsq.py

@@ -1,5 +1,5 @@
 import random
-from math import log2
+from math import ceil
 from functools import partial
 
 from typing import List

vector_quantize_pytorch/residual_lfq.py

@@ -1,5 +1,5 @@
 import random
-from math import log2
+from math import ceil, log2
 from functools import partial, cache
 
 import torch