Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  ea0d804321f24efc62af24379d911b3369c18d3b

Prevent fatal error while running unit tests

If any of the methods returning revision objects instead return null the test
will fatal.  This doesn't fix the underlying bug that caused a fatal, but allows
phpunit to finish running.

Change-Id: I8e507009d0470b3c2999a6a4d039fa57a657f324