Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  4645af076f47ce640878e7710b27995f4ea65ac5

Avoid getCleanSignature errors

Fatal error: Call to a member function getCleanSignatures() on a non-object in /a/common/php-1.24wmf19/includes/parser/Parser.php on line
4902

Change-Id: I98e7053604d4929a7e625cb48be524991e49f883