[fix] Fixed issue in dashboard map (east/west replication)

(cherry picked from commit 4ab982f)

Author: nemesifier

openwisp_monitoring/device/static/monitoring/js/device-map.js

@@ -248,7 +248,8 @@
                         let westWorldFeatures = window.structuredClone(netjsonGraph.data);
                         // Exclude the features that may be added for the East world map
                         westWorldFeatures.features = westWorldFeatures.features.filter(
-                            element => element.geometry.coordinates[0] <= 180
+                            (element) =>
+                                !element.geometry || element.geometry.coordinates[0] <= 180,
                         );
                         westWorldFeatures.features.forEach(element => {
                             if (element.geometry) {
@@ -263,7 +264,8 @@
                         let eastWorldFeatures = window.structuredClone(netjsonGraph.data);
                         // Exclude the features that may be added for the West world map
                         eastWorldFeatures.features = eastWorldFeatures.features.filter(
-                            element => element.geometry.coordinates[0] >= -180
+                            (element) =>
+                                !element.geometry || element.geometry.coordinates[0] >= -180,
                         );
                         eastWorldFeatures.features.forEach(element => {
                             if (element.geometry) {