NPE in filter when data layer is not active

[SergeyAstakhov]

What steps will reproduce the problem?

1. Download data from osm server. Activate filter for landuse=*
2. Activate another layer (nondata, for example gps layer), by green check box in layer list
3. The exception is raised.

What is the expected result?

What happens instead?

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: 2017-05-02 23:28:33 +0200 (Tue, 02 May 2017)
Build-Date:2017-05-02 21:34:40
Revision:12039
Relative:URL: ^/trunk

Identification: JOSM/1.5 (12039 ru) Windows 10 64-Bit
Memory Usage: 776 MB / 3632 MB (275 MB allocated, but free)
Java version: 1.8.0_121-b13, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 1920x1080
Maximum Screen Size: 1920x1080
VM arguments: [-Djava.security.manager, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm.jnlp, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlp.tk=awt, -Djnlpx.jvm=<java.home>\bin\javaw.exe, -Djnlpx.splashport=57210, -Djnlpx.home=<java.home>\bin, -Djnlpx.remove=false, -Djnlpx.offline=false, -Djnlpx.relaunch=true, -Djnlpx.session.data=C:\Temp\session1828304665303227632, -Djnlpx.heapsize=NULL,NULL, -Djava.security.policy=file:<java.home>\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.origFilenameArg=%UserProfile%\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\56\1ee8cfb8-303672cb]
Dataset consistency test: No problems found

Plugins:
+ ImportImagePlugin (33028)
+ OpeningHoursEditor (33185)
+ PicLayer (33148)
+ apache-commons (32994)
+ buildings_tools (33004)
+ ejml (32680)
+ geotools (33042)
+ imagery_offset_db (33004)
+ jts (32699)
+ log4j (32699)
+ measurement (33088)
+ opendata (33245)
+ pbf (33241)
+ reverter (33088)
+ turnrestrictions (33088)
+ utilsplugin2 (33212)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/NewTags&zip=1
+ https://raw.githubusercontent.com/OpenSeaMap/josm/master/INT-1-preset.xml

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/AddressValidator&style&zip=1

Last errors/warnings:
- W:  Minefield (N34): Could not get presets icon presets/empty.png
- E: Не удалось найти изображение «presets/empty.png»
- W:  Spoil Ground (N62.*): Could not get presets icon presets/empty.png
- E: Не удалось найти изображение «presets/empty.png»
- W:  Extraction area (N63): Could not get presets icon presets/empty.png
- E: Не удалось найти изображение «presets/empty.png»
- W:  Supplimentary Information: Could not get presets icon presets/empty.png
- E: Не удалось найти изображение «presets/empty.png»
- W:  FIXMEs: Could not get presets icon presets/empty.png
- E: Handled by bug report queue: java.lang.NullPointerException


=== REPORTED CRASH DATA ===
BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-2 (44) of javawsApplicationThreadGroup
java.lang.NullPointerException
	at org.openstreetmap.josm.data.osm.FilterMatcher.test(FilterMatcher.java:227)
	at org.openstreetmap.josm.data.osm.FilterMatcher.isHidden(FilterMatcher.java:308)
	at org.openstreetmap.josm.data.osm.FilterWorker.doExecuteFilters(FilterWorker.java:45)
	at org.openstreetmap.josm.data.osm.FilterWorker.executeFilters(FilterWorker.java:34)
	at org.openstreetmap.josm.gui.dialogs.FilterTableModel.executeFilters(FilterTableModel.java:96)
	at org.openstreetmap.josm.gui.dialogs.FilterDialog.dataChanged(FilterDialog.java:347)
	at org.openstreetmap.josm.data.osm.event.DataChangedEvent.fire(DataChangedEvent.java:35)
	at org.openstreetmap.josm.data.osm.event.DatasetEventManager.fireConsolidatedEvents(DatasetEventManager.java:207)
	at org.openstreetmap.josm.data.osm.event.DatasetEventManager.access$300(DatasetEventManager.java:29)
	at org.openstreetmap.josm.data.osm.event.DatasetEventManager$EdtRunnable.run(DatasetEventManager.java:89)
	at java.awt.event.InvocationEvent.dispatch(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.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)

[Don-vip]

Closed as duplicate of #14762.