Fix exception path typo in app_queue.c try_calling().

(closes issue ASTERISK-20380)
Reported by: Jeremy Pepper
Patches:
      fix-local-channel-locking.patch (license #6350) patch uploaded by Jeremy Pepper
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Merged revisions 372624 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 372625 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 372626 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@372627 65c4cc65-6c06-0410-ace0-fbb531ad65f3