Fix a segfault that happens when using the -file option.
-rw-r--r-- 1225 .gitignore
-rw-r--r-- 1619 COPYRIGHT
-rw-r--r-- 16 DATE
-rw-r--r-- 12673 INSTALL
-rw-r--r-- 3782 MACHINES
-rw-r--r-- 21662 Makefile.am
-rw-r--r-- 1336 README
-rw-r--r-- 8 VERSION
-rwxr-xr-x 166 autogen.sh
drwxr-xr-x - config
-rw-r--r-- 27345 configure.ac
drwxr-xr-x - docs
drwxr-xr-x - etc
drwxr-xr-x - h
drwxr-xr-x - m4
drwxr-xr-x - man
drwxr-xr-x - mts
-rw-r--r-- 4061 nmh.spec
drwxr-xr-x - sbr
drwxr-xr-x - test
drwxr-xr-x - uip