constness fixes, round-trip and fuzz-testing for CHOICE
diff --git a/tests/tests-randomized/Makefile.am b/tests/tests-randomized/Makefile.am
index 07bba5e..d28968a 100644
--- a/tests/tests-randomized/Makefile.am
+++ b/tests/tests-randomized/Makefile.am
@@ -24,6 +24,7 @@
     ${srcdir}/check-bundles.sh
 
 TESTS =
+TESTS += bundles/00-NULL-bundle.txt
 TESTS += bundles/01-BOOLEAN-bundle.txt
 TESTS += bundles/02-INTEGER-bundle.txt
 TESTS += bundles/03-ENUMERATED-bundle.txt