i've tested, now you can too

libs/libcodec2/unittest/genres.c

@@ -22,8 +22,7 @@
   License for more details.
 
   You should have received a copy of the GNU Lesser General Public License
-  along with this program; if not, write to the Free Software
-  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+  along with this program; if not, see <http://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
@@ -47,7 +46,7 @@ int main(int argc, char *argv[])
 
   if (argc < 3) {
     printf("usage: %s InputFile ResidualFile\n", argv[0]);
-    exit(0);
+    exit(1);
   }
 
   /* Open files */