make_custom_stats overcount files in directory

[WeizhenWang-1210]

Suppose you have a folder named with path "D:/test", containing only one image "000391.png".

 -D:/
    -test:/
        -000391.png

The following script

from cleanfid import fid
if __name__ == "__main__":
    fid.make_custom_stats("test", "D:/test", mode="clean")

will have this output

(srkl2) PS D:\SRK-Diffusion> python -m clean-fid
Found 2 images in the folder D:/test
custom stats: test : 100%|███████████████████████████████████████████████████████████████| 1/1 [00:00<00:00,  2.48it/s]
saving custom FID stats to F:\Anaconda\envs\srkl2\lib\site-packages\cleanfid\stats\test_clean_custom_na.npz
saving custom KID stats to F:\Anaconda\envs\srkl2\lib\site-packages\cleanfid\stats\test_clean_custom_na_kid.npz

Which is inconsistent with the number of files contained under D:/test

I am running on a windows11 machine with RTX 4090 GPU.