filefrag: Restore "perfect" number of extents calculation for ext2/ext3

The FIEMAP support added in e2fsprogs 1.41.6 broke the "perfection
would be XXX expects" calculation restore it.

Also fix some gcc -Wall warnings as well.  (Cleaning up gcc -Wall is
what caused me to notice this regression).

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