filefrag: fix broken extent emulation and uninitialized variables

This started with the fm_ext being uninitialized, but upon closer
analysis I discovered that forcing extent emulation in FIBMAP mode
was reporting an extent for every block in the file.  Fix both
problems.

The Coverity bug was 1297512.

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