fix bug in previous commit to #3441 that would cause ref-counting problems for some code paths
when classad caching was turned on.
===VersionHistory:None=== bug never shipped.
Merge branch 'V7_9_5-branch' of ssh://ingwe.cs.wisc.edu/p/condor/repository/CONDOR_SRC into V7_9_5-branch
Merge branch 'V7_9_5-branch'