Fix issue for ePCO

src/common/utils/3gpp_conversions.cpp

@@ -103,6 +103,7 @@ void xgpp_conv::protocol_configuration_options_nas_to_core(
     // pco_nas.protocol_or_container_ids[i].length;
     // pco.protocol_or_container_ids[i].protocol_id =
     // pco_nas.protocol_or_container_ids[i].id;
+    if (pco_nas.protocol_or_container_ids[i].contents != nullptr) {
       unsigned char data[512] = {'\0'};
       memcpy(
           (void*) &data,
@@ -112,6 +113,8 @@ void xgpp_conv::protocol_configuration_options_nas_to_core(
           (char*) data, pco_nas.protocol_or_container_ids[i].contents->slen);
       // pco.protocol_or_container_ids[i].protocol_id_contents  = msg_bstr;
       pco_item.protocol_id_contents = msg_bstr;
+    }
+
     pco.protocol_or_container_ids.push_back(pco_item);
   }
 }