Fix Stop Play button not working for display alarm with audio file

Changelog

@@ -4,6 +4,7 @@ KAlarm Change Log
 * Fix checkboxes being disabled in Preferences dialogue.
 * Fix time spin boxes being displayed in the wrong position.
 * Fix crash when Try clicked to stop audio alarm with fade [KDE Bug 452962]
+* Fix Stop Play button not working for display alarm with audio file.
 
 === Version 3.4.0 (KDE Gear 22.04) --- 6 April 2022 ===
 * Allow calendars and date picker to be shown together in side panel [KDE Bug 440250]

src/messagedisplayhelper.cpp

@@ -883,7 +883,7 @@ void MessageDisplayHelper::startAudio()
         connect(audioPlayer, &AudioPlayer::readyToPlay, this, &MessageDisplayHelper::playReady);
         connect(audioThread, &QThread::finished, this, &MessageDisplayHelper::playFinished);
         if (mSilenceButton)
-            connect(mSilenceButton, &QAbstractButton::clicked, audioThread, &QThread::quit);
+            connect(mSilenceButton, &QAbstractButton::clicked, this, &MessageDisplayHelper::stopAudioPlay);
 
         // Notify after creating mAudioPlayer, so that isAudioPlaying() will
         // return the correct value.

src/messagedisplayhelper.h

@@ -130,6 +130,7 @@ private Q_SLOTS:
     void    slotSpeak();
     void    audioTerminating();
     void    startAudio();
+    void    stopAudioPlay()               { stopAudio(); }
     void    playReady();
     void    playFinished();
     void    slotSetRemainingTextDay()     { setRemainingTextDay(true); }