data_transfer: fix inverted condition

it's swarm if interactionId != ""

Change-Id: I5345eaeb60b71a45136a560507dd87a92049f043

src/data_transfer.cpp

@@ -782,7 +782,7 @@ OutgoingFile::process()
         // But for now, we can just avoid to emit errors to the client, because for outgoing
         // transfer in a swarm, for outgoingFiles, we know that the file is ok. And the peer
         // will retry the transfer if they need, so we don't need to show errors.
-        if (interactionId_.empty() && !correct)
+        if (!interactionId_.empty() && !correct)
             return;
         auto code = correct ? DRing::DataTransferEventCode::finished
                             : DRing::DataTransferEventCode::closed_by_peer;