app_queue: fix a couple leaks to struct call_queue in set_member_value

set_member_value has a couple leaks to references in the variable q
found through testsuite tests/queues/set_penalty.  Also remove the
REF_DEBUG_ONLY_QUEUES compiler declaration, this is no longer possible
with the updated REF_DEBUG code.

ASTERISK-24466 #close
Reported by: Corey Farrell
Review: https://reviewboard.asterisk.org/r/4125/


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@426805 65c4cc65-6c06-0410-ace0-fbb531ad65f3