ftmod_libpri: Check for '#' key to leave overlap receiving state.

Same as ftmod_isdn, '#' key ends overlap receive and moves the incoming
call to RING state.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

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

@@ -1232,15 +1232,22 @@ static int on_info(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event
 		if (!ftdm_strlen_zero(pevent->ring.callednum)) {
 			int digits = strlen(pevent->ring.callednum);
 			int offset = strlen(caller_data->dnis.digits);
-			int len    = ftdm_min(sizeof(caller_data->dnis.digits) - 1 - offset, digits);	/* max. length without terminator */
+			int len    = 0;
 
+			if (strchr(pevent->ring.callednum, '#')) {
+				pevent->ring.complete = 1;
+				digits--;
+			}
+
+			len = ftdm_min(sizeof(caller_data->dnis.digits) - 1 - offset, digits);	/* max. length without terminator */
 			if (len < digits) {
 				ftdm_log_chan(chan, FTDM_LOG_WARNING, "Length %d of digit string exceeds available space %d of DNIS, truncating!\n",
 					digits, len);
 			}
-
-			ftdm_copy_string(&caller_data->dnis.digits[offset], (char *)pevent->ring.callednum, len + 1);	/* max. length with terminator */
-			caller_data->dnis.digits[offset + len] = '\0';
+			if (len) {
+				ftdm_copy_string(&caller_data->dnis.digits[offset], (char *)pevent->ring.callednum, len + 1);	/* max. length with terminator */
+				caller_data->dnis.digits[offset + len] = '\0';
+			}
 		}
 		if (pevent->ring.complete) {
 			ftdm_log_chan_msg(chan, FTDM_LOG_DEBUG, "Number complete indicated, moving channel to RING state\n");