Fix crash clicking ok in empty transcoding dialog

src/bin/bin.cpp

@@ -4926,9 +4926,8 @@ void Bin::requestSelectionTranscoding()
 {
     if (m_transcodingDialog == nullptr) {
         m_transcodingDialog = new TranscodeSeek(this);
-        connect(m_transcodingDialog, &QDialog::accepted, this, [&] () {
-            QMap<QString,QStringList> ids = m_transcodingDialog->ids();
-            QString firstId = ids.firstKey();
+        connect(m_transcodingDialog, &QDialog::accepted, this, [&]() {
+            QMap<QString, QStringList> ids = m_transcodingDialog->ids();
             QMapIterator<QString, QStringList> i(ids);
             while (i.hasNext()) {
                 i.next();
@@ -4938,8 +4937,7 @@ void Bin::requestSelectionTranscoding()
             m_transcodingDialog->deleteLater();
             m_transcodingDialog = nullptr;
         });
-        connect(m_transcodingDialog, &QDialog::rejected, this, [&] () {
-            QString firstId = m_transcodingDialog->ids().firstKey();
+        connect(m_transcodingDialog, &QDialog::rejected, this, [&]() {
             m_transcodingDialog->deleteLater();
             m_transcodingDialog = nullptr;
         });