WMS crash

[anonymous]

What steps will reproduce the problem?

What is the expected result?

What happens instead?

Please provide any additional information below. Attach a screenshot if
possible.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2011-09-05 01:31:49
Last Changed Author: bastiK
Revision: 4399
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2011-09-04 22:13:51 +0200 (Sun, 04 Sep 2011)
Last Changed Rev: 4399

Identification: JOSM/1.5 (4399 cs)
Memory Usage: 77 MB / 247 MB (37 MB allocated, but free)
Java version: 1.6.0_27, Sun Microsystems Inc., Java HotSpot(TM) Client VM
Operating system: Windows 7
Dataset consistency test: No problems found


java.lang.NullPointerException
	at org.openstreetmap.josm.gui.preferences.AddWMSLayerPanel.commaSepLayerList(AddWMSLayerPanel.java:283)
	at org.openstreetmap.josm.gui.preferences.AddWMSLayerPanel.buildGetMapUrl(AddWMSLayerPanel.java:274)
	at org.openstreetmap.josm.gui.preferences.AddWMSLayerPanel.access$800(AddWMSLayerPanel.java:68)
	at org.openstreetmap.josm.gui.preferences.AddWMSLayerPanel$6.stateChanged(AddWMSLayerPanel.java:228)
	at javax.swing.JTabbedPane.fireStateChanged(Unknown Source)
	at javax.swing.JTabbedPane$ModelListener.stateChanged(Unknown Source)
	at javax.swing.DefaultSingleSelectionModel.fireStateChanged(Unknown Source)
	at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(Unknown Source)
	at javax.swing.JTabbedPane.setSelectedIndexImpl(Unknown Source)
	at javax.swing.JTabbedPane.setSelectedIndex(Unknown Source)
	at javax.swing.plaf.basic.BasicTabbedPaneUI$Handler.mousePressed(Unknown Source)
	at java.awt.Component.processMouseEvent(Unkn