Crash when using the indoor helper plugin when a defined preset file is not available.

[DeeHants]

What steps will reproduce the problem?

1. Have a preset file defined that is not currently available
2. Enable the indoor helper plugin
3. Press "Power".

What is the expected result?

The plugin pane to be enabled

What happens instead?

Exception loading the non existent preset file.

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

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-03-13 01:17:21 +0100 (Sun, 13 Mar 2016)
Build-Date:2016-03-13 02:35:00
Revision:9979
Relative:URL: ^/trunk

Identification: JOSM/1.5 (9979 en_GB) Windows 7 64-Bit
Memory Usage: 123 MB / 989 MB (40 MB allocated, but free)
Java version: 1.8.0_71-b15, Oracle Corporation, Java HotSpot(TM) Client VM
Dataset consistency test: No problems found

Plugins:
- InfoMode (31772)
- OpeningHoursEditor (31772)
- buildings_tools (31895)
- contourmerge (1014)
- gpsblam (31772)
- imageryadjust (31772)
- indoor_sweepline (32103)
- indoorhelper (1458561683)
- measurement (31895)
- public_transport (31895)
- public_transport_layer (31932)
- reverter (32005)
- splinex (31895)
- turnrestrictions (31895)
- undelete (31895)
- utilsplugin2 (32099)

Last errors/warnings:
- W: Invalid jar file ''C:\Users\dee.earley\AppData\Roaming\JOSM\plugins\utilsplugin2.jar.new'' (exists: false, canRead: false)
- E: java.io.FileNotFoundException: H:\OSM\Cabinets.presets.xml (The system cannot find the file specified)
- E: H:\OSM\Cabinets.presets.xml
- E: java.lang.NoClassDefFoundError: org/openstreetmap/josm/data/Preferences$MapListSetting. Cause: java.lang.ClassNotFoundException: org.openstreetmap.josm.data.Preferences$MapListSetting

java.lang.NoClassDefFoundError: org/openstreetmap/josm/data/Preferences$MapListSetting
	at controller.IndoorHelperController.setPluginPreferences(IndoorHelperController.java:408)
	at controller.IndoorHelperController.access$300(IndoorHelperController.java:62)
	at controller.IndoorHelperController$ToolPowerButtonListener.actionPerformed(IndoorHelperController.java:141)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.JToggleButton$ToggleButtonModel.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$500(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.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)
Caused by: java.lang.ClassNotFoundException: org.openstreetmap.josm.data.Preferences$MapListSetting
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 40 more

[Don-vip]

Closed as duplicate of #12704.