Fixed VS2013 assignment operator compiler warnings

modules/juce_core/containers/juce_ListenerList.cpp

@@ -35,6 +35,9 @@ struct ListenerBase
     ListenerBase (int& counter) : c (counter) {}
     virtual ~ListenerBase() {}
 
+    // Required to supress VS2013 compiler warnings
+    ListenerBase& operator= (const ListenerBase&) = delete;
+
     virtual void f () = 0;
     virtual void f (void*) = 0;
     virtual void f (void*, void*) = 0;
@@ -50,6 +53,9 @@ struct Listener1 : public ListenerBase
 {
     Listener1 (int& counter) : ListenerBase (counter) {}
 
+    // Required to supress VS2013 compiler warnings
+    Listener1& operator= (const Listener1&) = delete;
+
     void f () override                                         { c += 1; }
     void f (void*) override                                    { c += 2; }
     void f (void*, void*) override                             { c += 3; }
@@ -63,6 +69,9 @@ struct Listener2 : public ListenerBase
 {
     Listener2 (int& counter) : ListenerBase (counter) {}
 
+    // Required to supress VS2013 compiler warnings
+    Listener1& operator= (const Listener1&) = delete;
+
     void f () override                                         { c -= 2; }
     void f (void*) override                                    { c -= 4; }
     void f (void*, void*) override                             { c -= 6; }

modules/juce_events/messages/juce_MessageManager.h

@@ -365,6 +365,10 @@ private:
     struct ThreadChecker : BailOutChecker
     {
         ThreadChecker (Thread* const, ThreadPoolJob* const);
+
+        // Required to supress VS2013 compiler warnings
+        ThreadChecker& operator= (const ThreadChecker&) = delete;
+
         bool shouldAbortAcquiringLock() override;
 
         Thread* const threadToCheck;