Move the init_queue call back to where it used to be (changed

Move the init_queue call back to where it used to be (changed
Sept 12 last year). It was moved then to prevent a memory leak.
Since then, the same memory leak recurred and was fixed in a
better way.

Now it has been found that the placement of this init_queue
call can cause problems if a realtime queue has values changed
to an empty string. The problem is that the default value
for that queue parameter would not be set.

(closes issue #13084)
Reported by: elbriga

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@131369 65c4cc65-6c06-0410-ace0-fbb531ad65f3