Correct manager variable 'EventList' case.

(closes issue #17520)
Reported by: kobaz
Patches:
      manager.patch uploaded by kobaz (license 834)
Tested by: lmadsen


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@272252 65c4cc65-6c06-0410-ace0-fbb531ad65f3