diff -ur ../ksirk-4.14.3-orig/ksirk/iris/src/xmpp/xmpp-im/filetransfer.cpp ./ksirk/iris/src/xmpp/xmpp-im/filetransfer.cpp
--- ../ksirk-4.14.3-orig/ksirk/iris/src/xmpp/xmpp-im/filetransfer.cpp	2014-05-11 07:08:05.000000000 +0900
+++ ./ksirk/iris/src/xmpp/xmpp-im/filetransfer.cpp	2020-04-15 18:54:33.000000000 +0900
@@ -396,7 +396,7 @@
 
 bool FileTransferManager::isActive(const FileTransfer *ft) const
 {
-	return d->list.contains(const_cast<FileTransfer*>(ft)) > 0;
+	return d->list.contains(const_cast<FileTransfer*>(ft)) != NULL;
 }
 
 void FileTransferManager::pft_incoming(const FTRequest &req)