--- a/util/vcard.lua	Wed May 28 21:52:57 2014 +0200
+++ b/util/vcard.lua	Wed May 28 22:09:32 2014 +0200
@@ -17,6 +17,7 @@
 local line_sep = "\n";
 
 local vCard_dtd; -- See end of file
+local vCard4_dtd;
 
 local function fold_line()
 	error "Not implemented" --TODO