undefind 체크

src/components/map/naver/dron/DronMarker.js

@@ -195,7 +195,7 @@ export const DronMarker = props => {
     const warnList = controlGpArcrftWarnList?.filter(
       i => i.cntrlId === gps.controlId
     );
-    if (warnList.length > 0) {
+    if (warnList?.length > 0) {
       if (warnList[0].controlWarnCd) {
         marker.setIcon({
           content: `<img ${getIcon.content.substr(
@@ -253,6 +253,7 @@ export const DronMarker = props => {
   //마커를 셋팅 한다.
   const markerInit = () => {
     if (controlGpList) {
+      console.log(controlGpList);
       allRemoveMarkers();
       controlGpList.map(item => {
         let position = new naver.maps.LatLng(item.lat, item.lng);