Fix uninitialized variable warning in konsole_globalaccel.cpp

The compiler may produce a false positive -Wconditional-uninitialized compiler warning.

kconf_update/konsole_globalaccel.cpp

@@ -7,6 +7,8 @@
 #include <KGlobalAccel>
 #include <KService>
 
+#include <optional>
+
 static void migrateShortcut(const QString &desktopFile, const QList<QKeySequence> &shortcuts)
 {
     const KService::Ptr service = KService::serviceByStorageId(desktopFile);
@@ -26,24 +28,22 @@ int main(int argc, char **argv)
 
     KConfig khotkeysrc(QStringLiteral("khotkeysrc"), KConfig::SimpleConfig);
     const int dataCount = KConfigGroup(&khotkeysrc, "Data").readEntry("DataCount", 0);
-    bool foundKmenuedit = false;
-    int kmenueditIndex;
+    std::optional<int> kmenueditIndex = std::nullopt;
     KConfigGroup kmenueditGroup;
     for (int i = 1; i <= dataCount; ++i) {
         kmenueditGroup = KConfigGroup(&khotkeysrc, QStringLiteral("Data_%1").arg(i));
         if (kmenueditGroup.readEntry("Name") == QLatin1String("KMenuEdit")) {
-            foundKmenuedit = true;
             kmenueditIndex = i;
             break;
         }
     }
-    if (!foundKmenuedit) {
+    if (!kmenueditIndex.has_value()) {
         return 0;
     }
 
     const int shortcutCount = kmenueditGroup.readEntry("DataCount", 0);
     for (int i = 1; i <= shortcutCount; ++i) {
-        const QString groupName = QStringLiteral("Data_%1_%2").arg(kmenueditIndex).arg(i);
+        const QString groupName = QStringLiteral("Data_%1_%2").arg(kmenueditIndex.value()).arg(i);
         if (KConfigGroup(&khotkeysrc, groupName).readEntry("Type") == QLatin1String("MENUENTRY_SHORTCUT_ACTION_DATA")) {
             const QString desktopFile = KConfigGroup(&khotkeysrc, groupName + QStringLiteral("Actions0")).readEntry("CommandURL");
             if (desktopFile == QLatin1String("org.kde.konsole.desktop")) {