Add Urho3D namespace

Source/Urho3D/Core/Object.h

@@ -367,7 +367,7 @@ struct URHO3D_API EventNameRegistrar
 };
 
 /// Describe an event's hash ID and begin a namespace in which to define its parameters.
-#define URHO3D_EVENT(eventID, eventName) static const Urho3D::StringHash eventID(EventNameRegistrar::RegisterEventName(#eventName)); namespace eventName
+#define URHO3D_EVENT(eventID, eventName) static const Urho3D::StringHash eventID(Urho3D::EventNameRegistrar::RegisterEventName(#eventName)); namespace eventName
 /// Describe an event's parameter hash ID. Should be used inside an event namespace.
 #define URHO3D_PARAM(paramID, paramName) static const Urho3D::StringHash paramID(#paramName)
 /// Convenience macro to construct an EventHandler that points to a receiver object and its member function.