misc: use ext2_ino_t instead of ino_t

misc: use ext2_ino_t instead of ino_t

Some of the new fastcommit and casefold changes used the system
"ino_t" instead of "ext2_ino_t" for handling filesystem inodes.
This causes printf warnings if the system "ino_t" is of a different
size.  Use the library "ext2_ino_t" for consistency.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>