After removing data layer, dragging causes stack

[iandees]

I'm on Mac OS X 10.8.3 with the Apple 1.6 JVM.

After I delete the last data layer (and the Bing imagery is the only layer left) and attempt to pan by ctrl+dragging, I get the stack trace below:

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2013-06-17 01:35:02
Last Changed Author: Don-vip
Revision: 6012
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2013-06-16 14:44:57 +0200 (Sun, 16 Jun 2013)
Last Changed Rev: 6012

Identification: JOSM/1.5 (6012 en) Mac OS X 10.8.3
Memory Usage: 187 MB / 1015 MB (45 MB allocated, but free)
Java version: 1.6.0_45, Apple Inc., Java HotSpot(TM) 64-Bit Server VM
VM arguments: [-Xmx1024M, -Dsun.java2d.opengl=true]

Plugin: OpeningHoursEditor (29435)
Plugin: buildings_tools (29596)
Plugin: jts (29613)
Plugin: reverter (29663)
Plugin: utilsplugin2 (29615)
Plugin: waydownloader (29435)

java.lang.NullPointerException
	at org.openstreetmap.josm.actions.mapmode.SelectAction.selectPrims(SelectAction.java:876)
	at org.openstreetmap.josm.actions.mapmode.SelectAction.selectionEnded(SelectAction.java:635)
	at org.openstreetmap.josm.gui.SelectionManager.mouseReleased(SelectionManager.java:211)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273)
	at java.awt.Component.processMouseEvent(Component.java:6382)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3275)
	at java.awt.Component.processEvent(Component.java:6147)
	at java.awt.Container.processEvent(Container.java:2083)
	at java.awt.Component.dispatchEventImpl(Component.java:4744)
	at java.awt.Container.dispatchEventImpl(Container.java:2141)
	at java.awt.Component.dispatchEvent(Component.java:4572)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4619)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4280)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4210)
	at java.awt.Container.dispatchEventImpl(Container.java:2127)
	at java.awt.Window.dispatchEventImpl(Window.java:2489)
	at java.awt.Component.dispatchEvent(Component.java:4572)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:710)
	at java.awt.EventQueue.access$400(EventQueue.java:82)
	at java.awt.EventQueue$2.run(EventQueue.java:669)
	at java.awt.EventQueue$2.run(EventQueue.java:667)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
	at java.awt.EventQueue$3.run(EventQueue.java:683)
	at java.awt.EventQueue$3.run(EventQueue.java:681)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:680)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

[Don-vip]

In 6013/josm:

fix #8806 - NPE in SelectAction