Null terminate the wide string in torrent creator.

src/torrentcreator/torrentcreatorthread.cpp

@@ -130,8 +130,9 @@ void TorrentCreatorThread::run() {
     // create the torrent and print it to out
     qDebug("Saving to %s", qPrintable(save_path));
 #ifdef _MSC_VER
-    wchar_t *wsave_path = new wchar_t[save_path.length()];
-    save_path.toWCharArray(wsave_path);
+    wchar_t *wsave_path = new wchar_t[save_path.length()+1];
+    int len = save_path.toWCharArray(wsave_path);
+    wsave_path[len+1] = '\0';
     std::ofstream outfile(wsave_path, std::ios_base::out|std::ios_base::binary);
     delete[] wsave_path;
 #else