mod_freetdm: Add missing break in on_clear_channel_signal() FTDM_SIGEVENT_UP case statement.

FTDM_SIGEVENT_UP was falling through to FTDM_SIGEVENT_PROGRESS_MEDIA, which
does (almost) the same, so no harm, but still fix it.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

libs/freetdm/mod_freetdm/mod_freetdm.c

@@ -2458,6 +2458,7 @@ static FIO_SIGNAL_CB_FUNCTION(on_clear_channel_signal)
 					spanid, chanid, (uuid) ? uuid : "N/A");
 			}
 		}
+		break;
 	case FTDM_SIGEVENT_PROGRESS_MEDIA:
 		{
 			if ((session = ftdm_channel_get_session(sigmsg->channel, 0))) {