Fix reference counting issue in ConsoleKit code

diff --cc NEWS
index 58ae8265b970e1158930396e2cab7d11a967b635,58ae8265b970e1158930396e2cab7d11a967b635..2ef139981f49ffb2b81f02c5015719d606264c1b
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -30,6 -30,6 +30,7 @@@ Overview of changes in lightdm 1.1.
      * Fix over allocation of read buffer in greeter protocol
      * Make sure objects are cleaned up on exit
      * Fix minor memory leaks
++    * Fix reference counting issue in ConsoleKit code
  
  Overview of changes in lightdm 1.0.0