freetdm: Fill in DAHDI function pointer to retrieve the next channel event

libs/freetdm/src/ftdm_io.c

@@ -1188,7 +1188,7 @@ FT_DECLARE(ftdm_status_t) ftdm_channel_read_event(ftdm_channel_t *ftdmchan, ftdm
 	ftdm_channel_lock(ftdmchan);
 
 	if (!span->fio->channel_next_event) {
-		ftdm_log(FTDM_LOG_ERROR, "channel_next_event method not implemented in module %s!", span->fio->name);
+		ftdm_log(FTDM_LOG_ERROR, "channel_next_event method not implemented in module %s!\n", span->fio->name);
 		status = FTDM_NOTIMPL;
 		goto done;
 	}

libs/freetdm/src/ftmod/ftmod_zt/ftmod_zt.c

@@ -1375,6 +1375,7 @@ static FIO_IO_LOAD_FUNCTION(zt_init)
 	zt_interface.write = zt_write;
 	zt_interface.poll_event = zt_poll_event;
 	zt_interface.next_event = zt_next_event;
+	zt_interface.channel_next_event = zt_channel_next_event;
 	zt_interface.channel_destroy = zt_channel_destroy;
 	zt_interface.get_alarms = zt_get_alarms;
 	*fio = &zt_interface;