# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1422667057 -3600
# Node ID 6b26599f8401610b45a55ba8ceffb051f9017769
# Parent  0422e648e0065b20290ced769e4c9545bc494c03
Do not try and generate free/busy objects for invalid transactions.

diff -r 0422e648e006 -r 6b26599f8401 imiptools/handlers/common.py
--- a/imiptools/handlers/common.py	Sat Jan 31 02:16:46 2015 +0100
+++ b/imiptools/handlers/common.py	Sat Jan 31 02:17:37 2015 +0100
@@ -37,7 +37,8 @@
 
         # Return a published object.
 
-        return [(True, to_part("PUBLISH", calendar))]
+        if calendar:
+            return [(True, to_part("PUBLISH", calendar))]
 
     def make_freebusy(self, from_organiser=True, publish=False):