Turn nullptr into {} when initializing flags

To make some people happy :)

Also see discussion on:
  https://phabricator.kde.org/D3987#95858

src/kacalendar.cpp

@@ -415,7 +415,7 @@ Type type(const QString &mimeType)
 
 Types types(const QStringList &mimeTypes)
 {
-    Types types = nullptr;
+    Types types = {};
     for (const QString &type : mimeTypes) {
         if (type == MIME_ACTIVE) {
             types |= ACTIVE;

src/kaevent.cpp

@@ -865,7 +865,7 @@ void KAEventPrivate::set(const KCalCore::Event::Ptr &event)
     mRepeatAtLogin      = false;
     mDisplaying         = false;
     mCommandScript      = false;
-    mExtraActionOptions = nullptr;
+    mExtraActionOptions = {};
     mDeferral           = NO_DEFERRAL;
     mSoundVolume        = -1;
     mFadeVolume         = -1;
@@ -1186,7 +1186,7 @@ void KAEventPrivate::set(const KADateTime &dateTime, const QString &text, const
     mDisplayingEdit         = false;
     mArchive                = false;
     mReminderAfterTime      = DateTime();
-    mExtraActionOptions     = nullptr;
+    mExtraActionOptions     = {};
     mCompatibility          = KACalendar::Current;
     mReadOnly               = false;
     mCommandError           = KAEvent::CMD_NO_ERROR;
@@ -1689,7 +1689,7 @@ KAEvent::Flags KAEvent::flags() const
 
 KAEvent::Flags KAEventPrivate::flags() const
 {
-    KAEvent::Flags result(nullptr);
+    KAEvent::Flags result({});
     if (mBeep) {
         result |= KAEvent::BEEP;
     }
@@ -3983,7 +3983,7 @@ void KAEventPrivate::readAlarm(const Alarm::Ptr &alarm, AlarmData &data, bool au
             }
             data.cleanText += alarm->programArguments();
         }
-        data.extraActionOptions = nullptr;
+        data.extraActionOptions = {};
         if (flags.contains(KAEventPrivate::EXEC_ON_DEFERRAL_FLAG)) {
             data.extraActionOptions |= KAEvent::ExecPreActOnDeferral;
         }