"dsp_drop_silence" always enabled for paging calls

There was an earlier bug about default "talk optimization" (see http://issues.freepbx.org/browse/FREEPBX-6335) but this seems like it might have resurfaced.

Specifically, the following line from paging/functions.inc.php line 500:
$conferences_conf->addConfUser($u, 'dsp_drop_silence', 'yes');
Seems to enable the "dsp_drop_silence" AKA talk optimization (I think) for all paging calls. This makes it almost useless as a general "monitor". There should at least be an option to disable this.

In my use, I've simply replaced the "yes" with a "no" and it has solved my immediate problem, but obviously future updates will break this repeatedly.