fix --list on truncated files

fix --list on truncated files

fseek() doesn't indicate when it moves past the end of a file.
Consequently, if a file is truncated within its last block, the error would't be detected.

This PR adds a test scenario that induces this situation using a small compressed file of only one block in size.
This test is added to tests/playTests.sh

Check is implemented by ensuring that the filehandle position is equal to the filesize upon exit.