resize2fs: fix gcc -Wall nits and valgrind complaints

One of these fixes was triggering failures when running:

./test_scripts --valgrind r_move_itable r_inline_xattr r_resize_inode

It should be a false positive, but it fixing this makes it easier to
see real problems.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2 files changed