Index: trunk/src/org/openstreetmap/josm/data/osm/Relation.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/osm/Relation.java	(revision 3358)
+++ trunk/src/org/openstreetmap/josm/data/osm/Relation.java	(revision 3359)
@@ -46,4 +46,6 @@
             if (members != null) {
                 this.members = members.toArray(new RelationMember[members.size()]);
+            } else {
+                this.members = new RelationMember[0];
             }
             for (RelationMember rm:this.members) {