[Patch] NPE when clicking in TMS layer

[Don-vip]

What steps will reproduce the problem?

1. Launch JOSM
2. Select Imagery -> OpenStreetMap (Mapnik)
3. Left-click anywhere in the TMS layer

What is the expected result? nothing

What happens instead? An error message.

Please find a patch that resolves this issue.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2011-09-09 01:31:58
Last Changed Author: simon04
Revision: 4410
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2011-09-08 17:00:04 +0200 (Thu, 08 Sep 2011)
Last Changed Rev: 4410

Identification: JOSM/1.5 (4410 fr)
Memory Usage: 154 MB / 3729 MB (114 MB allocated, but free)
Java version: 1.7.0, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Operating system: Windows 7

Plugin: cadastre-fr (26606)
Plugin: epci-fr (26605)
Plugin: licensechange (26606)
Plugin: openstreetbugs (26606)
Plugin: photo_geotagging (26606)
Plugin: restart (26606)

java.lang.NullPointerException
	at org.openstreetmap.josm.gui.layer.TMSLayer$12$1.mouseClicked(TMSLayer.java:499)
	at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
	at java.awt.AWTEventMulticaster.mouseClicked(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$000(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)