freetdm: ss7 - bug fix for crash on startup

libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_in.c

@@ -466,6 +466,14 @@ void sngss7_sta_ind(uint32_t suInstId, uint32_t spInstId, uint32_t circuit, uint
 	uint32_t			intfId;
 	int 				x;
 
+	/* confirm that the circuit is active on our side otherwise move to the next circuit */
+	if (!sngss7_test_flag(&g_ftdm_sngss7_data.cfg.isupCkt[circuit], SNGSS7_ACTIVE)) {
+		SS7_ERROR("[CIC:%d]Rx %s but circuit is not active yet, skipping!\n",
+					g_ftdm_sngss7_data.cfg.isupCkt[circuit].cic,
+					DECODE_LCC_EVENT(evntType));
+		return;
+	}
+
 	/* check if the eventType is a pause/resume */
 	switch (evntType) {
 	/**************************************************************************/