Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  71d148959f3f5c3a2070afc0b2b3864527f7c247

Avoid duplicate implementations of existing checks

The array_flip change is a bit different because there is no
existing check. The reason is that the array is usually very small
and array_flip is more expensive and confusing than a simple search.

Change-Id: Ibed9242e44db21db6c14c42de23f3bf68eddd315