Ticket #637: nodoubleadd.diff

src/org/openstreetmap/josm/gui/dialogs/RelationEditor.java

@@ -292 +292 @@
         
         private void addSelected() {
                 for (OsmPrimitive p : Main.ds.getSelected()) {
-                        RelationMember em = new RelationMember();
-                        em.member = p;
-                        em.role = "";
-                        clone.members.add(em);
+                        boolean skip = false;
+                        for (RelationMember rm : clone.members) {
+                                if (rm.member == p)
+                                {
+                                        skip = true;
+                                        break;
+                                }
+                        }
+                        if(!skip)
+                        {
+                                RelationMember em = new RelationMember();
+                                em.member = p;
+                                em.role = "";
+                                clone.members.add(em);
+                        }
                 }
                 refreshTables();
         }