fixup! connector/tomatrix: fix video stickers

Signed-off-by: Sumner Evans <sumner.evans@automattic.com>

Author: sumnerevans

pkg/connector/tomatrix.go

@@ -327,7 +327,9 @@ func (c *TelegramClient) convertMediaRequiringUpload(ctx context.Context, portal
 				content.MsgType = event.MsgVideo
 				transferer = transferer.WithVideo(a)
 
-				extraInfo["fi.mau.telegram.round_message"] = a.RoundMessage
+				if a.RoundMessage {
+					extraInfo["fi.mau.telegram.round_message"] = a.RoundMessage
+				}
 				extraInfo["duration"] = int(a.Duration * 1000)
 			case *tg.DocumentAttributeAudio:
 				if content.MsgType != event.MsgVideo {