Fix err_test.

I forgot to commit before landing the last change and still had this
outstanding in my client.

Change-Id: Ie1f533e671be130f738d562b129b5151b7be9c1e

crypto/err/err_test.c

@@ -108,7 +108,7 @@ static int test_print() {
 static int test_release() {
   ERR_put_error(1, 2, 3, "test", 4);
   ERR_remove_thread_state(NULL);
-  return 0;
+  return 1;
 }
 
 int main() {