Deck card fallback is wrong

[SystemKeeper]

talk-ios/NextcloudTalk/BaseChatTableViewCell.swift

Line 250 in 25ebf7e

if referenceDataRaw == nil, let deckCard = cellMessage.deckCard() {

The check is wrong, as we get openGraph data back and referenceDataRaw will most of the time not be nil. Need to check in more depth here.