OPENZAP-220 fix blocked into read and add cause for a correct hangup

libs/freetdm/src/ftmod/ftmod_libpri/ftmod_libpri.c

@@ -1251,6 +1251,8 @@ static ftdm_status_t state_advance(ftdm_channel_t *chan)
 					} else if (caller_data->hangup_cause == PRI_CAUSE_DESTINATION_OUT_OF_ORDER) {
 						/* Can happen when we have a DL link expire or some timer expired */
 						ftdm_set_state_locked(chan, FTDM_CHANNEL_STATE_HANGUP_COMPLETE);
+					} else if (caller_data->hangup_cause == PRI_CAUSE_INVALID_NUMBER_FORMAT) {
+						ftdm_set_state_locked(chan, FTDM_CHANNEL_STATE_HANGUP_COMPLETE);
 					}
 				}
 			}

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

@@ -1402,7 +1402,7 @@ static FIO_READ_FUNCTION(zt_read)
 			} else {
 				ftdm_log_chan_msg(ftdmchan, FTDM_LOG_DEBUG, "Skipping one IO read cycle due to DTMF event processing\n");
 			}
-			continue;
+			break;
 		}
 
 		/* Read error, keep going unless to many errors force us to abort ...*/