This module lacked necessary module ref count incrementing and decrementing
when used. This patch adds it. There's already a datastore used, so doing the
ref counting along with the lifetime of the datastore provides a convenient
place to do it.
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@412279 65c4cc65-6c06-0410-ace0-fbb531ad65f3