Made the Desktop class clear any pending animations before shutting down.

modules/juce_gui_basics/components/juce_Desktop.cpp

@@ -36,7 +36,8 @@ Desktop::Desktop()
 Desktop::~Desktop()
 {
     setScreenSaverEnabled (true);
-
+    animator.cancelAllAnimations (false);
+    
     jassert (instance == this);
     instance = nullptr;