[COVERITY] Free potential null dereference bug in e2fsck

At the second conditional iter->file could still be NULL. We need to
check for it again.  Should never happen in practice, but better to be
sure.

Coverity ID: 6: Forward Null

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2 files changed