Fixed a type in a statement.

VistaCoreLibs/VistaAspects/VistaObserver.h

@@ -164,7 +164,7 @@ private:
 class VISTAASPECTSAPI VistaSimpleObserver : public IVistaObserver
 {
 public:
-	std::function< void( IVistaObserveable*, int, int ) > ObserverUpdateFunc;
+	typedef std::function< void( IVistaObserveable*, int, int ) > ObserverUpdateFunc;
 
 public:
 	VistaSimpleObserver( ObserverUpdateFunc fnObserverUpdate );