make-secnet-sites: Apply list() to keys in delempty

It is not permitted (in Python3) to modify a dictionary like this,
while iterating over keys().  We have to make a list of the keys,
copying them.

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

diff --git a/make-secnet-sites b/make-secnet-sites
index 76d74f1a6907944b1cb5b3b2d5e2be31e1c54fae..1cc979b57e4c5c7ecb66ffcbee9edf19154541cd 100755 (executable)
--- a/make-secnet-sites
+++ b/make-secnet-sites
@@ -527,7 +527,7 @@ def live(n):
        return 0
 def delempty(n):
        "Delete nodes that have no leafnode children"
-       for i in n.children.keys():
+       for i in list(n.children.keys()):
                delempty(n.children[i])
                if not live(n.children[i]):
                        del n.children[i]