nailing-carog: Cope if no subdirs specified

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

diff --git a/nailing-cargo b/nailing-cargo
index 1bca9d048a2751fee7b1ba0a8aa2818d0ef77fee..d6f0a5bd075fbc8868daad01946b87b8a85a77f3 100755 (executable)
--- a/nailing-cargo
+++ b/nailing-cargo
@@ -357,6 +357,8 @@ sub readnail () {
   }
   die "$e ?" if length $e;
 
+  $nail->{subdirs} //= [ ];
+
   if (!ref $nail->{subdirs}) {
     $nail->{subdirs} = [
       grep /^[^\#]/,