Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  833cf2e85143717b92c7aa2f3b9c8b687230daaa

Log a warning if ItemChange::getSiteLinkDiff returns a non-array

Untested quick and dirty fix

Change-Id: Idfab159d2077bd3c85dd4eee99e1b7bb11e1a4e2