GUAMI decoding fixed

  - GUAMI is received from INITIAL UE CONTEXT SETUP REQUEST
  - using BIT STRING instead of OCTET STRING, as per spec

openair3/NGAP/ngap_gNB_handlers.c

@@ -743,9 +743,10 @@ static int ngap_gNB_handle_initial_context_request(sctp_assoc_t assoc_id, uint32
   TBCD_TO_MCC_MNC(&ie->value.choice.GUAMI.pLMNIdentity, msg->guami.mcc,
                   msg->guami.mnc, msg->guami.mnc_len);
     
-    OCTET_STRING_TO_INT8(&ie->value.choice.GUAMI.aMFRegionID, msg->guami.amf_region_id);
-    OCTET_STRING_TO_INT16(&ie->value.choice.GUAMI.aMFSetID, msg->guami.amf_set_id);
-    OCTET_STRING_TO_INT8(&ie->value.choice.GUAMI.aMFPointer, msg->guami.amf_pointer);
+  msg->guami.amf_region_id = BIT_STRING_to_uint8(&ie->value.choice.GUAMI.aMFRegionID);
+  msg->guami.amf_set_id = BIT_STRING_to_uint16(&ie->value.choice.GUAMI.aMFSetID);
+  msg->guami.amf_pointer = BIT_STRING_to_uint8(&ie->value.choice.GUAMI.aMFPointer);
+
 
   NGAP_FIND_PROTOCOLIE_BY_ID(NGAP_InitialContextSetupRequestIEs_t, ie, container, NGAP_ProtocolIE_ID_id_PDUSessionResourceSetupListCxtReq, false);
   if (ie != NULL) {