Added various clang-tidy modernize-* fixes

modules/juce_events/broadcasters/juce_ActionListener.h

@@ -35,7 +35,7 @@ class JUCE_API  ActionListener
 {
 public:
     /** Destructor. */
-    virtual ~ActionListener()  {}
+    virtual ~ActionListener() = default;
 
     /** Overridden by your subclass to receive the callback.
 

modules/juce_events/broadcasters/juce_ChangeListener.h

@@ -45,7 +45,7 @@ class JUCE_API  ChangeListener
 {
 public:
     /** Destructor. */
-    virtual ~ChangeListener()  {}
+    virtual ~ChangeListener() = default;
 
     /** Your subclass should implement this method to receive the callback.
         @param source the ChangeBroadcaster that triggered the callback.

modules/juce_events/messages/juce_CallbackMessage.h

@@ -49,10 +49,10 @@ class JUCE_API  CallbackMessage   : public MessageManager::MessageBase
 {
 public:
     //==============================================================================
-    CallbackMessage() noexcept {}
+    CallbackMessage() = default;
 
     /** Destructor. */
-    ~CallbackMessage() {}
+    ~CallbackMessage() override = default;
 
     //==============================================================================
     /** Called when the message is delivered.
@@ -63,7 +63,7 @@ public:
         Note that like all other messages, this object will be deleted immediately
         after this method has been invoked.
     */
-    virtual void messageCallback() = 0;
+    virtual void messageCallback() override = 0;
 
 private:
     // Avoid the leak-detector because for plugins, the host can unload our DLL with undelivered

modules/juce_events/messages/juce_MessageManager.h

@@ -186,8 +186,8 @@ public:
     class JUCE_API  MessageBase  : public ReferenceCountedObject
     {
     public:
-        MessageBase() noexcept {}
-        virtual ~MessageBase() {}
+        MessageBase() = default;
+        ~MessageBase() override = default;
 
         virtual void messageCallback() = 0;
         bool post();