Another bug related to Undo functions

[kr12]

Reproduce with plugin FastDraw (ImproveWayAccuracy)

1. select way, with some point of it out of downloaded area
2. click w
3. press alt
4. mouse click in out of downloaded area near way
5. select no in dialog

Repository Root: ​http://josm.openstreetmap.de/svn
Build-Date: 2013-05-08 01:34:29
Last Changed Author: stoecker
Revision: 5939
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: ​http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2013-05-07 14:05:08 +0200 (Tue, 07 May 2013)
Last Changed Rev: 5939

Identification: JOSM/1.5 (5939 en) Windows 7 64-Bit
Memory Usage: 1006 MB / 1006 MB (636 MB allocated, but free)
Java version: 1.7.0_17, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
VM arguments: [-XX:+UseConcMarkSweepGC, -XX:+DisableExplicitGC, -XX:+UseAdaptiveGCBoundary, -XX:MaxGCPauseMillis=500, -XX:-UseGCOverheadLimit, -XX:SurvivorRatio=12, -Xnoclassgc, -XX:UseSSE=3, -Xincgc, -Xmx1G, -Xms1G]
Dataset consistency test: No problems found

Plugin: FastDraw (29532)
Plugin: alignways (29435)
Plugin: buildings_tools (29435)
Plugin: conflation (0.1.6)
Plugin: continuosDownload (28565)
Plugin: contourmerge (1003)
Plugin: imagery_offset_db (29467)
Plugin: jts (29435)
Plugin: junctionchecking (29525)
Plugin: merge-overlap (29435)
Plugin: reltoolbox (29535)
Plugin: reverter (29561)
Plugin: tagging-preset-tester (29435)
Plugin: utilsplugin2 (29435)

java.lang.NullPointerException

at org.openstreetmap.josm.data.UndoRedoHandler.addNoRedraw(UndoRedoHandler.java:36)
at org.openstreetmap.josm.data.UndoRedoHandler.add(UndoRedoHandler.java:58)
at org.openstreetmap.josm.actions.mapmode.ImproveWayAccuracyAction.mouseReleased(ImproveWayAccuracyAction.java:471)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)