Description of problem:
checksum crc gives wrong checksum

Version-Release number of selected component (if applicable):
libguestfs-1.0.85-1.fc12.3.x86_64, 
latest git version 1.3.8

How reproducible:
100%

Steps to Reproduce:
1. run guestfish, add one existing image, run and mount it to /
2. run "checksum crc your_file"

  
Actual results:
return incorrect 9~10 digits

Expected results:
should return 32bit(4 bytes hex) crc checksum value

Additional info:
All other checksums are correct(md5/sha1/sha256 etc.)

uploading the test scripts "file_content.sh" and log file "output.log" during the test