CRC of secret does not match

[kellerkind]

Steps to reproduce:

1. Create an export of a key

./gpg2paper/gpg2paper.py export --keyid 0EEA0F23C0051DFFE1AD5CF408DDAA857B879A26 --png --out 0EEA0F23C0051DFFE1AD5CF408DDAA857B879A26

2. Investigate created barcode files

$ ls -la *.png
-rw-rw-rw- 1 gun gun 3396 Jan  4 16:50 0EEA0F23C0051DFFE1AD5CF408DDAA857B879A261.png
-rw-rw-rw- 1 gun gun 3419 Jan  4 16:50 0EEA0F23C0051DFFE1AD5CF408DDAA857B879A262.png
-rw-rw-rw- 1 gun gun 3472 Jan  4 16:50 0EEA0F23C0051DFFE1AD5CF408DDAA857B879A263.png
-rw-rw-rw- 1 gun gun 3293 Jan  4 16:50 0EEA0F23C0051DFFE1AD5CF408DDAA857B879A264.png

3. Delete key from local keyring for testing the import

gpg --delete-secret-and-public-keys 0EEA0F23C0051DFFE1AD5CF408DDAA857B879A26

4. Try to import from qrcode files

./gpg2paper/gpg2paper.py import --pubkey /mnt/c/users/gun/gpg_key.pub --png --in *.png
scanned 1 barcode symbols from 1 images in 0.28 seconds

scanned 1 barcode symbols from 1 images in 0.24 seconds

scanned 2 barcode symbols from 1 images in 0.24 seconds

scanned 1 barcode symbols from 1 images in 0.2 seconds

CRC of secret does not match (5CBB88!=5A5099)
Unable to read secrets file