quicksettings: Fix flashlight

quicksettings/flashlight/flashlightutil.cpp

 /*
+ * SPDX-FileCopyrightText: 2020 Han Young <hanyoung@protonmail.com>
  * SPDX-FileCopyrightText: 2022 by Devin Lin <devin@kde.org>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
@@ -13,6 +14,7 @@
 
 FlashlightUtil::FlashlightUtil(QObject *parent)
     : QObject{parent}
+    , m_torchEnabled{false}
 {
 }