NullPointerException when creating a relation without the data layer selected

[avar]

1. Open a GPX track
2. Don't download data
3. Click "New relation"

java.lang.NullPointerException
	at org.openstreetmap.josm.gui.dialogs.relation.RelationEditor.updateTitle(RelationEditor.java:107)
	at org.openstreetmap.josm.gui.dialogs.relation.RelationEditor.setRelation(RelationEditor.java:132)
	at org.openstreetmap.josm.gui.dialogs.relation.RelationEditor.<init>(RelationEditor.java:99)
	at org.openstreetmap.josm.gui.dialogs.relation.GenericRelationEditor.<init>(GenericRelationEditor.java:125)
	at org.openstreetmap.josm.gui.dialogs.relation.RelationEditor.getEditor(RelationEditor.java:84)
	at org.openstreetmap.josm.gui.dialogs.RelationListDialog$2.actionPerformed(RelationListDialog.java:106)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
	at java.awt.Component.processMouseEvent(Component.java:6263)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
	at java.awt.Component.processEvent(Component.java:6028)
	at java.awt.Container.processEvent(Container.java:2041)
	at java.awt.Component.dispatchEventImpl(Component.java:4630)
	at java.awt.Container.dispatchEventImpl(Container.java:2099)
	at java.awt.Component.dispatchEvent(Component.java:4460)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
	at java.awt.Container.dispatchEventImpl(Container.java:2085)
	at java.awt.Window.dispatchEventImpl(Window.java:2475)
	at java.awt.Component.dispatchEvent(Component.java:4460)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

[plaicy]

The problem: There is no data layer this way and Main.map.mapView.getEditLayer() returns null in RelationListDialog (action performed). The NPE is also thrown if you double click in the white area of the relation component. I attach a patch which test for null earlier (does not solve the problem).

[Gubaer]

fixed in r1866