app_confbridge: Add missing destructor call to announcer channel destructor.

........

Merged revisions 410671 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@410672 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/confbridge/conf_chan_announce.c

@@ -75,6 +75,7 @@ static void announce_pvt_destructor(void *vdoomed)
 
 	ao2_cleanup(doomed->bridge);
 	doomed->bridge = NULL;
+	ast_unreal_destructor(&doomed->base);
 }
 
 static struct ast_channel *announce_request(const char *type, struct ast_format_cap *cap, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *data, int *cause)