Platform as multipolygon should be valid

[d.k@…]

What steps will reproduce the problem?

1. Create a public_transport=platform as a multipolygon, like used i.e. in Karlsruhe main station -> ​https://www.openstreetmap.org/relation/140179#map=18/48.99343/8.40222
2. Set as member of an relation with public_transport=stop_area
3. Upload the change

What is the expected result?

No validation error.

What happens instead?

Validation result: Warning:

Role member does not match expression public_transport=platform in template Stop Area - Role verification problem

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

Revision: 8109
Repository Root: http://josm.openstreetmap.de/svn
Relative URL: ^/trunk
Last Changed Author: Don-vip
Last Changed Date: 2015-03-02 00:13:51 +0100 (Mon, 02 Mar 2015)
Build-Date: 2015-03-02 02:30:58
URL: http://josm.openstreetmap.de/svn/trunk
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last Changed Rev: 8109

Identification: JOSM/1.5 (8109 en) Windows 7 64-Bit
Memory Usage: 140 MB / 247 MB (31 MB allocated, but free)
Java version: 1.8.0_31, Oracle Corporation, Java HotSpot(TM) Client VM
VM arguments: [-Djava.security.manager, -Djava.security.policy=file:C:\Program Files (x86)\Java\jre1.8.0_31\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>\bin, -Djnlpx.origFilenameArg=C:\Users\User\Desktop\josm.jnlp, -Djnlpx.remove=true, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.splashport=57661, -Djnlpx.jvm=<java.home>\bin\javaw.exe, -Djnlpx.vmargs=LURqYXZhLnV0aWwuQXJyYXlzLnVzZUxlZ2FjeU1lcmdlU29ydD10cnVlAA==]
Dataset consistency test: No problems found

Plugins:
- utilsplugin2 (31040)

[Klumbumbus]

In 8112/josm:

fix #11196 - fix validator warning, fix link