Make the MeetMeAdmin N command (mute all nonadmins) not mute admins

(Closes Issue ASTERISK-19335)
Reported by: Johan Wilfer
Review: https://reviewboard.asterisk.org/r/1843/
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Merged revisions 361090 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 361091 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@361092 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_meetme.c

@@ -4716,7 +4716,7 @@ static int admin_exec(struct ast_channel *chan, const char *data) {
 		user->adminflags |= ADMINFLAG_MUTED;
 		break;
 	case 78: /* N: Mute all (non-admin) users */
-		ao2_callback(cnf->usercontainer, OBJ_NODATA, user_set_muted_cb, NULL);
+		ao2_callback(cnf->usercontainer, OBJ_NODATA, user_set_muted_cb, &cnf);
 		break;					
 	case 109: /* m: Unmute */ 
 		user->adminflags &= ~(ADMINFLAG_MUTED | ADMINFLAG_SELFMUTED | ADMINFLAG_T_REQUEST);