e2fsck: always ask to fix an inode that fails checksum verification

e2fsck: always ask to fix an inode that fails checksum verification

If an inode fails checksum verification during pass 1 and the user
doesn't fix or clear the inode as part of the regular inode checks,
ensure that e2fsck remembers to ask the user if he simply wants to
correct the checksum.

We weren't capturing all the ways out of an interation of the inode
scanning loop, which means that not all errors were caught.  Also,
we might as well clear the 'failed csum' flag if we write the inode
directly from the inode scanning loop.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>