comprehensive-test: Actually allow OLD_SECNET_DIR set to ''

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/comprehensive-test b/comprehensive-test
index cf01c7b0d736931a5aeaa6b08f28e2896cc23f4b..1d5ee7f4262c699e1968fe1a5fe08c34bea587fc 100755 (executable)
--- a/comprehensive-test
+++ b/comprehensive-test
@@ -15,7 +15,7 @@ for arg in "$@"; do
     esac
 done
 
-case "${OLD_SECNET_DIR:?must be set, perhaps to the empty string}" in
+case "${OLD_SECNET_DIR-:?must be set, perhaps to the empty string}" in
     ''|/*)
         ;;
     ../*)