Fix #1566

There is only one queue at the moment, and if someone wants multiple
queues, it's probably not a good idea to hard-code queues as integers.

This reverts commit 9a90c961.
This introduces double free
I tend to prefer a memleak as a race condition rather than a crash

It does provide sufficient/useful infos for external build.
Use pkg-config vlc-plugin instead.

(If you don't want to give an object, then use fprintf() really...)