Updated mediawiki/extensions
Project: mediawiki/extensions/SemanticMediaWiki  6d7d28eb89b3fc5faebcd833f68883f656ceb138

Prevent fatal when viewing Special:Types/foobar

Also change "datatype" to "data type" per
http://en.wikipedia.org/wiki/Data_type.

Change-Id: I0ee052adc4c469113e8494944e33dbf3961b7187