Fix unhandled exception when trying to create torrents from files/folder in disk root.

src/torrentcreator/torrentcreatorthread.cpp

@@ -38,6 +38,7 @@
 #include <libtorrent/file_pool.hpp>
 #include <libtorrent/create_torrent.hpp>
 #include <QFile>
+#include <QDir>
 
 #include "torrentcreatorthread.h"
 #include "fs_utils.h"
@@ -128,7 +129,7 @@ void TorrentCreatorThread::run() {
     }
     if (abort) return;
     // calculate the hash for all pieces
-    const QString parent_path = fsutils::branchPath(input_path);
+    const QString parent_path = fsutils::branchPath(input_path) + QDir::separator();
     set_piece_hashes(t, parent_path.toUtf8().constData(), boost::bind<void>(&sendProgressUpdateSignal, _1, t.num_pieces(), this));
     // Set qBittorrent as creator and add user comment to
     // torrent_info structure