NPE in WMSImagery.imageFormatHasTransparency

[anonymous]

What steps will reproduce the problem?

1. set, then delete checkbar "Хранит лишь граничные точки WMS", url== ​http://citrin.ru/cadastre?FORMAT=image/jpeg&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=&STYLES=&SRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2014-05-26 07:29:16
Last Changed Author: akks
Revision: 7182
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2014-05-26 09:22:25 +0200 (Mon, 26 May 2014)
Last Changed Rev: 7182

Identification: JOSM/1.5 (7182 ru) Windows 7 64-Bit
Memory Usage: 100 MB / 455 MB (29 MB allocated, but free)
Java version: 1.7.0_45, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
VM arguments: [-Xms16m, -Xmx512m]

Plugin: ImportImagePlugin
Plugin: buildings_tools (30485)
Plugin: openstreetbugs (30436)
Plugin: reverter (30436)
Plugin: turnlanes (30416)
Plugin: turnrestrictions (30454)

java.lang.NullPointerException
	at org.openstreetmap.josm.io.imagery.WMSImagery.imageFormatHasTransparency(WMSImagery.java:228)
	at org.openstreetmap.josm.io.imagery.WMSImagery.buildGetMapUrl(WMSImagery.java:105)
	at org.openstreetmap.josm.gui.preferences.imagery.AddWMSLayerPanel.onLayerSelectionChanged(AddWMSLayerPanel.java:149)
	at org.openstreetmap.josm.gui.preferences.imagery.AddWMSLayerPanel$2.itemStateChanged(AddWMSLayerPanel.java:109)
	at javax.swing.AbstractButton.fireItemStateChanged(Unknown Source)
	at javax.swing.AbstractButton$Handler.itemStateChanged(Unknown Source)
	at javax.swing.DefaultButtonModel.fireItemStateChanged(Unknown Source)
	at javax.swing.JToggleButton$ToggleButtonModel.setSelected(Unknown Source)
	at javax.swing.JToggleButton$ToggleButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.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.pumpEventsForFilter(Unknown Source)
	at java.awt.WaitDispatchSupport$2.run(Unknown Source)
	at java.awt.WaitDispatchSupport$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.WaitDispatchSupport.enter(Unknown Source)
	at java.awt.Dialog.show(Unknown Source)
	at java.awt.Component.show(Unknown Source)
	at java.awt.Component.setVisible(Unknown Source)
	at java.awt.Window.setVisible(Unknown Source)
	at java.awt.Dialog.setVisible(Unknown Source)
	at org.openstreetmap.josm.gui.ExtendedDialog.setVisible(ExtendedDialog.java:484)
	at org.openstreetmap.josm.gui.ExtendedDialog.showDialog(ExtendedDialog.java:281)
	at org.openstreetmap.josm.gui.preferences.imagery.ImageryPreference$ImageryProvidersPanel$NewEntryAction.actionPerformed(ImageryPreference.java:471)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	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)
...<snip>...