Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  d0a91fa94ad5a6ddd9a37f46f798bfb5e83c1286

Fix fatal when submitting summary

Fatal error: Call to undefined method Flow\Model\PostSummary::getRootPost()

Change-Id: I14846dfa4d0c6fcd3708cc296851ae83c7250a78