tests: ensure at least one failure when $built_programs is empty

Before, this test and others would pass with empty $built_programs.
* tests/misc/help-version: Fail if built_programs is empty.

diff --git a/tests/misc/help-version b/tests/misc/help-version
index 6cbf138..da900a5 100755 (executable)
--- a/tests/misc/help-version
+++ b/tests/misc/help-version
@@ -40,6 +40,9 @@ expected_failure_status_vdir=2
 
 fail=0
 
+test "$built_programs" \
+  || { echo "$this_test: no programs built!?!" 1>&2; (exit $fail); exit $fail; }
+
 for lang in C fr da; do
   for i in $built_programs; do